Remove superfluous XML namespaces from HTML tables

[jan-cerny]

The root element defines some XML namespaces that aren't used in any child element so we don't have to declare them.

[github-actions]

Start a new ephemeral environment with changes proposed in this pull request:

Fedora Environment

Oracle Linux 8 Environment

[codeclimate]

Code Climate has analyzed commit 82ea366 and detected 0 issues on this pull request.

The test coverage on the diff in this pull request is 100.0% (50% is the threshold).

This pull request will bring the total coverage in the repository to 40.8% (0.0% change).

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[Mab879]

Looking through the output, I see <sub> elements in the table outputs. For example, build/tables/table-rhel8-stig.html. Is this expected?

[jan-cerny]

@Mab879 That's a great point! No, it isn't expected. They shouldn't be there. They also have a wrong namespace or don't have a namespace and <sub> means something else in HTML. This problem isn't caused by this PR, it's present in the current upstream master as well. It also affects unlinked-stig-xccdf.xml. I think that's a bug during the generation of OCIL. Check ssg-rhel8-ocil.xml where you can find weird elements like below and these element propagate to the table.

22995       <ocil:question_text>Verify Red Hat Enterprise Linux 8 is configured to lock an account after 
22996 unsuccessful logon attempts with the command:
22997 
22998 
22999 $ grep 'deny =' /etc/security/faillock.conf
23000 deny = .
23001       Is it the case that the "deny" option is not set to "&lt;sub 
idref="var_accounts_passwords_pam_faillock_deny" /&gt;"
23002 or less (but not "0"), is missing or commented out?
23003       </ocil:question_text>

[jan-cerny]

@Mab879 I think that it's basically the same problem that is already tracked in #4354 so I have add there a comment that mentions our problems.

[Mab879]

After reviewing the comments for the PR this seems reasonable; the issues identified are pre-existing and don't need to be fixed in this PR.