Missing references test

[mildas]

Description:

Add test for checking missing references in profiles.

Usage:
$ tests/missing_refs.sh python3 build/ssg-rhel8-xccdf.xml ospp stig hipaa

$1 - python executable (for cmake, ${PYTHON_EXECUTABLE})
$2 - product xccdf
$3+ - list of profiles

Rationale:

Test that will be added to gating.

[mildas]

I will split this PR into two PRs - this one will add only the test and the new PR will add it to SSGCommon.cmake

[jan-cerny]

Have you considered making this an CMake macro instead of a bash script to avoid having multiple abstraction levels?

[mildas]

@jan-cerny No. Actually, I didn't think about CMake macro approach at all because it didn't occur to me.
With the macro, we could avoid multiple abstraction levels, but do you think it will be readable? I mean, if implementing this in CMake macro won't be unnecessarily complicated when it can be easily done in Bash script + other tests are in a form of standalone script and this one will be as a macro.

[jan-cerny]

I think it would be readable

other tests are in a form of standalone script and this one will be as a macro.

That's a good argument against it.

[mildas]

@jan-cerny What do you think? Should I implement it as CMake macro or are you fine with current approach?

[jan-cerny]

@mildas I'm fine with either way.

[openshift-ci]

@mildas: The following test failed, say /retest to rerun all failed tests:

Test name	Commit	Details	Rerun command
ci/prow/e2e-aws-rhcos4-e8	9351f85	link	/test e2e-aws-rhcos4-e8

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[mildas]

@jan-cerny PR is updated. Bash script will be better because the script will be also used in daily Jenkins job to check all profiles.