Fix install script for 3.0.0-preview Docker images #3992

Job	Run time
Basic Checks	1m 49s
Unit Tests	9m 54s
Integration Tests (raft)	14m 13s
Integration Tests (pvtdata)	12m 6s
Integration Tests (pvtdatapurge e2e)	24m 56s
Integration Tests (ledger)	15m 43s
Integration Tests (lifecycle)	7m 28s
Integration Tests (smartbft)	20m 14s
Integration Tests (discovery gossip devmode pluggable)	9m 34s
Integration Tests (gateway idemix pkcs11 configtx configtxlator)	20m 25s
Integration Tests (sbe nwo msp)	9m 29s
	2h 25m 51s

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