Add unit tests for testhelper package #421

Job	Run time
qe-testing (accesscontrol)	25m 24s
qe-testing (affiliatedcertification)	8m 50s
qe-testing (manageability)	9m 19s
qe-testing (networking)	26m 18s
qe-testing (lifecycle)	25m 31s
qe-testing (performance)	10m 15s
qe-testing (platformalteration)	10m 1s
qe-testing (observability)	13m 11s
qe-testing (operator)	10m 49s
	2h 19m 38s

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