added rest api processing to OSN to update the channel configuration #778

Job	Run time
Basic Checks	3m 24s
Unit Tests	8m 44s
Integration Tests (pvtdatapurge e2e)	19m 34s
Integration Tests (raft)	12m 12s
Integration Tests (lifecycle)	5m 12s
Integration Tests (ledger)	12m 4s
Integration Tests (pvtdata)	11m 34s
Integration Tests (gateway idemix pkcs11 configtx configtxlator)	16m 6s
Integration Tests (smartbft)	20m 23s
Integration Tests (sbe nwo msp)	7m 12s
Integration Tests (discovery gossip devmode pluggable)	7m 36s
	2h 4m 1s

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