Revert back OVAL check for sshd_disable_compression to use xccdf variable.

[ggbecker]

Description:

• Revert back OVAL check for sshd_disable_compression to use xccdf variable. Previously it would accept both no and delayed values even though in the profile the selected value is no (default one).

Rationale:

• Changes based on this comment since they are very similar: Update OVAL check and remediations for sshd_use_priv_separation. #6022 (comment)

@redhatrises Does this change make sense?

Reference: https://vaulted.io/library/disa-stigs-srgs/red_hat_enterprise_linux_7_security_technical_implementation_guide/V-72267?version=v2r7

[mildas]

Changes identified:
Rule sshd_disable_compression:
 Templatization usage changed in linux_os/guide/services/ssh/ssh_server/sshd_disable_compression/oval/shared.xml.

Recommended tests to execute:
 build_product ol8
 tests/test_suite.py rule --libvirt qemu:///system test-suite-vm --remediate-using bash --datastream build/ssg-ol8-ds.xml sshd_disable_compression

[openshift-ci-robot]

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

Test name	Commit	Details	Rerun command
ci/prow/e2e-aws-rhcos4-moderate	8219412	link	/test e2e-aws-rhcos4-moderate
ci/prow/e2e-aws-rhcos4-e8	8219412	link	/test e2e-aws-rhcos4-e8

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[redhatrises]

Description:

• Revert back OVAL check for sshd_disable_compression to use xccdf variable. Previously it would accept both no and delayed values even though in the profile the selected value is no (default one).

Rationale:

• Changes based on this comment since they are very similar: #6022 (comment)

@redhatrises Does this change make sense?

Reference: https://vaulted.io/library/disa-stigs-srgs/red_hat_enterprise_linux_7_security_technical_implementation_guide/V-72267?version=v2r7

@ggbecker yes it does. I think my brain was fried when I reviewed this originally.