fix fail test with cover flag #577

Job	Run time
Basic Checks	1m 41s
Unit Tests	9m 28s
Integration Tests (raft)	11m 29s
Integration Tests (pvtdata)	11m 14s
Integration Tests (pvtdatapurge e2e)	10m 8s
Integration Tests (ledger)	12m 30s
Integration Tests (lifecycle)	5m 29s
Integration Tests (smartbft)	19m 34s
Integration Tests (discovery gossip devmode pluggable)	5m 36s
Integration Tests (gateway idemix pkcs11 configtx configtxlator)	18m 16s
Integration Tests (sbe nwo msp)	6m 41s
	1h 52m 6s

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