Enable the flags feature of codecov, each test is one #70

Job	Run time
Collect tests	5s
Code coverage (phpunit_bisect_test)	10m 34s
Test (phpunit_bisect_test)	9m 35s
Code coverage (behat_test)	7m 43s
Code coverage (runner_test)	1m 51s
Code coverage (postjobs_test)	12m 56s
Test (behat_test)	8m 3s
Code coverage (phpunit_test)	7m 24s
Test (runner_test)	1m 54s
Code coverage (behat_bisect_test)	7m 33s
Test (postjobs_test)	12m 45s
Test (phpunit_test)	7m 18s
Test (behat_bisect_test)	7m 8s
	1h 34m 49s

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