Revert image FABRIC_CFG_PATH to /etc/hyperledger/fabric (#4574) #2519

Job	Run time
Basic Checks	3m 12s
Unit Tests	6m 20s
Integration Tests (raft)	13m 59s
Integration Tests (pvtdata)	11m 40s
Integration Tests (pvtdatapurge)	8m 2s
Integration Tests (ledger)	12m 29s
Integration Tests (lifecycle)	5m 4s
Integration Tests (e2e smartbft)	20m 1s
Integration Tests (discovery gossip devmode pluggable)	6m 15s
Integration Tests (gateway idemix pkcs11 configtx configtxlator)	20m 43s
Integration Tests (sbe nwo msp)	7m 41s
	1h 55m 26s

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