Fix memory leaks in #create() and #set_acl().
Fix memory leaks in #create() and #set_acl().

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