Change version for the version 3.1.3 -rc2 #3750

Job	Run time
CI / build / build	1m 19s
CI / basic (author) / author	8s
CI / basic (findbugs) / findbugs	1m 50s
CI / basic (checkstyle) / checkstyle	25s
CI / basic (rat) / rat	21s
CI / unit (grpc) / unit (grpc)	7m 46s
CI / unit (misc) / unit (misc)	6m 44s
CI / unit (server) / unit (server)	12m 13s
CI / repro / repro	1m 9s
CI / compile (17) / compile (17)	1m 7s
CI / compile (21) / compile (21)	1m 7s
CI / compile (11) / compile (11)	1m 1s
CI / coverage	2m 33s
	37m 43s

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