Fix read_only flag in kazoo connect
Fix read_only flag in kazoo connect

Only make it read-only if we're not joining the cluster

Also make join_cluster no longer have a default value of True

jrgp/iris-api-opensource,linkedin/iris,dwang159/iris-api,dwang159/iris-api,jrgp/iris-api-opensource,jrgp/iris-api-opensource,linkedin/iris,linkedin/iris,dwang159/iris-api,jrgp/iris-api-opensource,linkedin/iris,dwang159/iris-api