(PTFE-248) Remove stab branch simplify #898

Job	Run time
lint	33s
unit (utests)	1m 19s
unit (tests-server)	53s
unit (tests-api-mock)	1m 4s
integration (tests-noqueue, QuickTest)	1m 55s
integration (tests-noqueue, BuildFailedTest)	34s
integration (tests-noqueue, RepositoryTests)	33s
integration (tests-noqueue, TestQueueing)	39s
integration (tests-noqueue, TestBertE)	4m 52s
integration (tests-noqueue, TaskQueueTests)	3m 1s
integration (tests, BuildFailedTest)	33s
integration (tests, TaskQueueTests)	2m 54s
integration (tests, QuickTest)	2m 8s
integration (tests, TestQueueing)	4m 22s
integration (tests, TestBertE)	6m 16s
integration (tests, RepositoryTests)	35s
	32m 11s

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