Update write_first_app tutorial (release-2.5) #4386

Job	Run time
Basic Checks	3m 40s
Unit Tests	10m 28s
Integration Tests (pvtdatapurge)	6m 50s
Integration Tests (raft)	15m 7s
Integration Tests (gateway idemix pkcs11 configtx configtxlator)	9m 47s
Integration Tests (sbe nwo msp)	10m 22s
Integration Tests (lifecycle)	13m 23s
Integration Tests (ledger)	16m 56s
Integration Tests (pvtdata)	18m 25s
Integration Tests (e2e)	10m 8s
Integration Tests (discovery gossip devmode pluggable)	12m 40s
	2h 7m 46s

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