public String getJdbcURL(String dbName, String sessionConfExt) throws Exception {
    return getJdbcURL(dbName, sessionConfExt, "");
  }
return connection URL for this server instance
@param dbName - DB name to be included in the URL
@param sessionConfExt - Additional string to be appended to sessionConf part of url
@return
@throws Exception
itests/util/src/main/java/org/apache/hive/jdbc/miniHS2/MiniHS2.java