support prometheus metric #43

Job	Run time
download midwares and cache	6s
set-execution-conditions	10s
build agent and cache	3m 10s
Test for spring (1.5.0.RELEASE, Edgware.SR2, 1.5.0.RELEASE)	14m 25s
Test for spring (2.0.2.RELEASE, Finchley.RELEASE, 4.1.3, 2.0.0.RELEASE)	18m 4s
Test for spring (2.1.0.RELEASE, Greenwich.RELEASE, 4.2.6, 2.1.0.RELEASE)	16m 44s
Test for spring (2.2.0.RELEASE, Hoxton.RELEASE, 4.3.6, 2.2.0.RELEASE)	16m 54s
Test for spring (2.3.0.RELEASE, Hoxton.RELEASE, 4.4.1, 2.2.8.RELEASE)	16m 26s
Test for spring (2.4.0, 2020.0.0, 4.5.6, 2021.0.1.0)	13m 42s
Test for spring (2.6.2, 2021.0.0, 4.5.10, 2021.1)	13m 35s
Test for spring (2.7.2, 2021.0.3, 4.5.13)	13m 38s
	2h 6m 54s

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