Introduce quorum-replicas-to-write setting #614

Job	Run time
Prepare	1m 55s
Test (GODOG_FEATURE=00_cluster_smoke make test)	2m 10s
Test (GODOG_FEATURE=00_sentinel_smoke make test)	2m 37s
Test (GODOG_FEATURE=01_cluster_maintenance make test)	7m 3s
Test (GODOG_FEATURE=01_sentinel_maintenance make test)	7m 34s
Test (GODOG_FEATURE=02_cluster_switchover_from make test)	5m 50s
Test (GODOG_FEATURE=02_sentinel_switchover_from make test)	6m 50s
Test (GODOG_FEATURE=03_cluster_switchover_to make test)	4m 31s
Test (GODOG_FEATURE=03_sentinel_switchover_to make test)	5m 10s
Test (GODOG_FEATURE=04_cluster_failover make test)	17m 20s
Test (GODOG_FEATURE=04_sentinel_failover make test)	18m 57s
Test (GODOG_FEATURE=05_cluster_replication_fix make test)	6m 17s
Test (GODOG_FEATURE=05_sentinel_replication_fix make test)	5m 3s
Test (GODOG_FEATURE=06_cluster_lost make test)	5m 24s
Test (GODOG_FEATURE=06_sentinel_lost make test)	5m 34s
Test (GODOG_FEATURE=07_cluster_local_repair make test)	14m 21s
Test (GODOG_FEATURE=07_sentinel_local_repair make test)	15m 15s
	2h 11m 51s

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