Add a rationale for package_sssd_installed

[Mab879]

Description:

Add a rationale for package_sssd_installed

Rationale:

Fixes RHEL-178437

[openshift-ci]

@Mab879: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ci/prow/4.20-images	52dd04c	link	true	/test 4.20-images
ci/prow/4.19-images	52dd04c	link	true	/test 4.19-images
ci/prow/e2e-aws-openshift-node-compliance	52dd04c	link	true	/test e2e-aws-openshift-node-compliance

Full PR test history. Your PR dashboard.

Details

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[jan-cerny]

The rationale says briefly what sssd does. But it needs to explain why users need to install this package. I think this rationale won't satisfy the reporters of the linked RHEL ticket.

Is the package optional or a convenience package? What security capabilities will it bring? Why do STIG and other policies require this package?