ci: use exact match for systemroller instead of contains [citest_skip]

[richm]

This guards against the possibility of a user with 'systemroller' as part
of the username.

Signed-off-by: Rich Megginson rmeggins@redhat.com

[coderabbitai]

Important

Review skipped

Ignore keyword(s) in the title.

⛔ Ignored keywords (1)

• [citest_skip]

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