fix fail test with cover flag #3915

Job	Run time
Basic Checks	1m 34s
Unit Tests	7m 31s
Integration Tests (raft)	18m 31s
Integration Tests (pvtdata)	14m 1s
Integration Tests (pvtdatapurge e2e)	12m 23s
Integration Tests (ledger)	16m 54s
Integration Tests (lifecycle)	5m 0s
Integration Tests (smartbft)	22m 44s
Integration Tests (discovery gossip devmode pluggable)	5m 29s
Integration Tests (gateway idemix pkcs11 configtx configtxlator)	16m 4s
Integration Tests (sbe nwo msp)	12m 31s
	2h 12m 42s

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