bump github.com/fsouza/go-dockerclient to v1.12.3 and github.com/dock… #884

Job	Run time
Basic Checks	3m 35s
Unit Tests	22m 36s
Integration Tests (raft)	13m 56s
Integration Tests (pvtdata)	10m 49s
Integration Tests (pvtdatapurge e2e)	19m 1s
Integration Tests (ledger)	12m 38s
Integration Tests (lifecycle)	5m 27s
Integration Tests (gateway idemix pkcs11 configtx configtxlator)	17m 2s
Integration Tests (sbe nwo msp)	6m 51s
Integration Tests (smartbft)	19m 37s
Integration Tests (discovery gossip devmode pluggable)	7m 53s
	2h 19m 25s

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