handle the case where timeout is nil in CZookeeper#wait_until_connected
handle the case where timeout is nil in CZookeeper#wait_until_connected

songling88/zookeeper,songling88/zookeeper,rickypai/zookeeper,songling88/zookeeper,songling88/zookeeper,zk-ruby/zookeeper,zk-ruby/zookeeper,rickypai/zookeeper,zk-ruby/zookeeper,rickypai/zookeeper,rickypai/zookeeper