support collect currentFetchEventTimeLag metric #2

Job	Run time
Pre-compile Checks / Basic QA	8m 11s
Default (Java 8) / Compile	36m 52s
Default (Java 8) / Test packaging/licensing	5m 47s
Default (Java 8) / E2E (group 1)	1h 56m 5s
Default (Java 8) / Test (module: core)	35m 43s
Default (Java 8) / E2E (group 2)	2h 23m 5s
Default (Java 8) / Test (module: python)	30m 9s
Default (Java 8) / Test (module: table)	34m 3s
Default (Java 8) / Test (module: connect)	19m 47s
Default (Java 8) / Test (module: tests)	49m 30s
Default (Java 8) / Test (module: misc)	45m 10s
	8h 44m 22s

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