add badger as alternative state database #3302

Job	Run time
Basic Checks	3m 56s
Unit Tests	7m 41s
Integration Tests (raft)	12m 8s
Integration Tests (pvtdata)	11m 56s
Integration Tests (pvtdatapurge)	5m 21s
Integration Tests (ledger)	13m 45s
Integration Tests (lifecycle)	4m 47s
Integration Tests (e2e smartbft)	21m 42s
Integration Tests (discovery gossip devmode pluggable)	6m 15s
Integration Tests (gateway idemix pkcs11 configtx configtxlator)	17m 36s
Integration Tests (sbe nwo msp)	7m 45s
	1h 52m 52s

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