* Remove useless dependencies and add jsp-2.1-6.1.14
* Determine if principal is empty in getJdbcUrl method
* fix bug when register worker but create master node in zookeeper
* Remove useless dependencies such as hive-shims and log4j
* upgrade commons-email from 1.2 to 1.5 and remove mail-1.4.5.jar
* add support for postgresql in upgrade database
* add support for postgresql in upgrade database
* update mysql in upgrade from 1.1.0 to next version
* add table name change ddl