PTFE-1981 handle cancelled build on same sha #815

Job	Run time
unit (utests)	1m 13s
lint	36s
integration (tests-noqueue, QuickTest)	1m 41s
unit (tests-api-mock)	59s
integration (tests-noqueue, BuildFailedTest)	34s
unit (tests-server)	1m 5s
integration (tests-noqueue, RepositoryTests)	35s
integration (tests-noqueue, TestBertE)	5m 27s
integration (tests-noqueue, TestQueueing)	59s
integration (tests-noqueue, TaskQueueTests)	3m 42s
integration (tests, QuickTest)	1m 46s
integration (tests, BuildFailedTest)	37s
integration (tests, RepositoryTests)	35s
integration (tests, TestBertE)	6m 59s
integration (tests, TestQueueing)	5m 58s
integration (tests, TaskQueueTests)	3m 25s
	36m 11s

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