同一zookeeper下有多个hbase，都启动了phoenix transaction，使用Phoenix 查询引擎会出错

[liuyp2018]

同一zookeeper下有多个hbase，都启动了phoenix transaction，使用Phoenix 查询引擎执行命令： CREATE TABLE my_table (k BIGINT PRIMARY KEY, v VARCHAR) TRANSACTIONAL=true;时，会报以下错误：
ERROR distributed.TransactionServiceClient: Thrift error for org.apache.tephra.distributed.TransactionServiceClient$2@22df874e: java.net.UnknownHostException: cln-gc0dmmsq
java.lang.RuntimeException: org.apache.phoenix.shaded.org.apache.thrift.transport.TTransportException: java.net.UnknownHostException: cln-gc0dmmsq

[chilianyi]

tephra 启动时
leaderElection = new LeaderElection(zkClient, "/tx.service/leader", new ElectionHandler()
代码里固定的 zookeeper 路径，导致多个 tephra 无法共用一个 zookeeper。