Fix install script for 3.0.0-preview Docker images #3991

Job	Run time
Basic Checks	1m 48s
Unit Tests	11m 13s
Integration Tests (raft)	14m 8s
Integration Tests (pvtdata)	14m 45s
Integration Tests (pvtdatapurge e2e)	22m 49s
Integration Tests (ledger)	13m 23s
Integration Tests (lifecycle)	7m 23s
Integration Tests (smartbft)	20m 49s
Integration Tests (discovery gossip devmode pluggable)	10m 5s
Integration Tests (gateway idemix pkcs11 configtx configtxlator)	19m 54s
Integration Tests (sbe nwo msp)	9m 30s
	2h 25m 47s

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