PTFE-1981 handle cancelled build on same sha #814

Job	Run time
unit (utests)	1m 10s
integration (tests-noqueue, QuickTest)	1m 40s
lint	30s
unit (tests-api-mock)	57s
integration (tests-noqueue, BuildFailedTest)	34s
unit (tests-server)	1m 7s
integration (tests-noqueue, RepositoryTests)	34s
integration (tests-noqueue, TestBertE)	5m 36s
integration (tests-noqueue, TestQueueing)	33s
integration (tests-noqueue, TaskQueueTests)	3m 27s
integration (tests, QuickTest)	1m 41s
integration (tests, BuildFailedTest)	37s
integration (tests, RepositoryTests)	40s
integration (tests, TestBertE)	7m 5s
integration (tests, TestQueueing)	5m 29s
integration (tests, TaskQueueTests)	3m 31s
	35m 11s

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