PTFE-1981 handle cancelled build on same sha #812

Job	Run time
lint	29s
unit (utests)	1m 11s
integration (tests-noqueue, QuickTest)	1m 50s
integration (tests-noqueue, BuildFailedTest)	36s
integration (tests-noqueue, RepositoryTests)	33s
unit (tests-api-mock)	1m 1s
integration (tests-noqueue, TestBertE)	5m 45s
unit (tests-server)	58s
integration (tests-noqueue, TestQueueing)	37s
integration (tests-noqueue, TaskQueueTests)	3m 28s
integration (tests, QuickTest)	1m 41s
integration (tests, BuildFailedTest)	34s
integration (tests, RepositoryTests)	32s
integration (tests, TestBertE)	7m 5s
integration (tests, TestQueueing)	5m 26s
integration (tests, TaskQueueTests)	3m 29s
	35m 15s

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