Add tests for account-nav-button when multitenancy is disabled

[cwperks]

Signed-off-by: Craig Perkins cwperx@amazon.com

Description

This adds a test for #965 which is described in this issue 975

When multitenancy is disabled in opensearch_dashboards.yml the user should not be prompted with the tenant modal.

Category

New Tests

Issues Resolved

This resolves issue 975.

Check List

• New functionality includes testing
• New functionality has been documented
• Commits are signed per the DCO using --signoff

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.
For more information on following Developer Certificate of Origin and signing off your commits, please check here.

[codecov-commenter]

Codecov Report

Merging #1020 (5c9a76c) into main (b6fe0c0) will increase coverage by 0.05%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #1020      +/-   ##
==========================================
+ Coverage   72.21%   72.27%   +0.05%     
==========================================
  Files          87       87              
  Lines        1915     1915              
  Branches      249      249              
==========================================
+ Hits         1383     1384       +1     
  Misses        478      478              
+ Partials       54       53       -1     

Impacted Files	Coverage Δ
...-plugin/public/apps/account/account-nav-button.tsx	71.42% <0.00%> (+3.57%)	⬆️

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[peternied]

Please clean up the description, while this isn't required it would make it easier to parse and understand what this change accomplishes:

GITHUB-DESCRIPTION 1020.diff
Produced: 7/1/2022 11:57:34 AM

Mode:  All, Ignoring Unimportant
Left file: C:\Users\petern\Desktop\1.txt     Right file: C:\Users\petern\Desktop\2.txt
SUBJECT: Add tests for account-nav-button when multitenancy is disabled #1020                                                                                                                                                    =  SUBJECT: Add tests for account-nav-button when multitenancy is disabled #1020
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Signed-off-by: Craig Perkins <cwperx@amazon.com>                                                                                                                                                                                 +-
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### Description                                                                                                                                                                                                                     ### Description
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[Describe what this change achieves]                                                                                                                                                                                             +-
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                                                                                                                                                                                                                                 =
This adds a test for [#965](https://github.com/opensearch-project/security-dashboards-plugin/pull/965) which is described in this issue [975](https://github.com/opensearch-project/security-dashboards-plugin/issues/975)          This adds a test for [#965](https://github.com/opensearch-project/security-dashboards-plugin/pull/965) which is described in this issue [975](https://github.com/opensearch-project/security-dashboards-plugin/issues/975)

When multitenancy is disabled in `opensearch_dashboards.yml` the user should not be prompted with the tenant modal.                                                                                                                 When multitenancy is disabled in `opensearch_dashboards.yml` the user should not be prompted with the tenant modal.

### Category                                                                                                                                                                                                                        ### Category
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[Enhancement, New feature, Bug fix, Test fix, Refactoring, Maintenance, Documentation]                                                                                                                                           <>
                                                                                                                                                                                                                                    Test fix
### Why these changes are required?
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### What is the old behavior before changes and new behavior after changes?                                                                                                                                                      +-
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                                                                                                                                                                                                                                 =

### Issues Resolved                                                                                                                                                                                                                 ### Issues Resolved
[List any issues this PR will resolve (Is this a backport? If so, please add backport PR # and/or commits #)]                                                                                                                       [List any issues this PR will resolve (Is this a backport? If so, please add backport PR # and/or commits #)]
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                                                                                                                                                                                                                                 <> - Resolves #975
This resolves issue [975](https://github.com/opensearch-project/security-dashboards-plugin/issues/975).
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### Testing                                                                                                                                                                                                                      +-
[Please provide details of testing done: unit testing, integration testing and manual testing]
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### Check List                                                                                                                                                                                                                      ### Check List
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- [ ] New functionality includes testing                                                                                                                                                                                         <> - [X] New functionality includes testing
- [ ] New functionality has been documented                                                                                                                                                                                         - [ ] ~New functionality has been documented~
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
- [X] Commits are signed per the DCO using --signoff                                                                                                                                                                             =  - [X] Commits are signed per the DCO using --signoff

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.                                                                                                                  By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.
For more information on following Developer Certificate of Origin and signing off your commits, please check [here](https://github.com/opensearch-project/OpenSearch/blob/main/CONTRIBUTING.md#developer-certificate-of-origin).    For more information on following Developer Certificate of Origin and signing off your commits, please check [here](https://github.com/opensearch-project/OpenSearch/blob/main/CONTRIBUTING.md#developer-certificate-of-origin).
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[cliu123]

The PR looks good to me. Please resolve the only pending comment at this moment, so we can merge it. Thanks!