Bump github.com/go-zookeeper/zk from 1.0.3 to 1.0.4 #410

Job	Run time
Prepare	8s
Test (GODOG_FEATURE=00_cluster_smoke make test)	2m 14s
Test (GODOG_FEATURE=00_sentinel_smoke make test)	2m 32s
Test (GODOG_FEATURE=01_cluster_maintenance make test)	6m 45s
Test (GODOG_FEATURE=01_sentinel_maintenance make test)	7m 43s
Test (GODOG_FEATURE=02_cluster_switchover_from make test)	5m 16s
Test (GODOG_FEATURE=02_sentinel_switchover_from make test)	6m 45s
Test (GODOG_FEATURE=03_cluster_switchover_to make test)	4m 43s
Test (GODOG_FEATURE=03_sentinel_switchover_to make test)	5m 26s
Test (GODOG_FEATURE=04_cluster_failover make test)	17m 17s
Test (GODOG_FEATURE=04_sentinel_failover make test)	19m 20s
Test (GODOG_FEATURE=05_cluster_replication_fix make test)	6m 33s
Test (GODOG_FEATURE=05_sentinel_replication_fix make test)	5m 15s
Test (GODOG_FEATURE=06_cluster_lost make test)	4m 7s
Test (GODOG_FEATURE=06_sentinel_lost make test)	4m 37s
Test (GODOG_FEATURE=07_cluster_local_repair make test)	13m 47s
Test (GODOG_FEATURE=07_sentinel_local_repair make test)	14m 47s
	2h 7m 15s

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