Change version for the version 3.1.3 -rc2 #3748

Job	Run time
CI / build / build	1m 31s
CI / unit (server) / unit (server)	12m 11s
CI / basic (author) / author	12s
CI / unit (grpc) / unit (grpc)	7m 49s
CI / unit (misc) / unit (misc)	6m 21s
CI / basic (checkstyle) / checkstyle	29s
CI / basic (findbugs) / findbugs	1m 55s
CI / basic (rat) / rat	23s
CI / repro / repro	1m 31s
CI / compile (11) / compile (11)	1m 2s
CI / compile (17) / compile (17)	58s
CI / compile (21) / compile (21)	1m 14s
CI / coverage	3m 0s
	38m 36s

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