* rename from DatasourceUserMapper to DataSourceUserMapper
* add unit test in UserMapper and WorkerGroupMapper
* change cn.escheduler to org.apache.dolphinscheduler
* add unit test in UdfFuncMapperTest
* add unit test in UdfFuncMapperTest
* remove DatabaseConfiguration
* add ConnectionFactoryTest
* cal duration in processInstancesList
* change desc to description
* change table name in mysql ddl
* change table name in mysql ddl
* change escheduler to dolphinscheduler
* rename from DatasourceUserMapper to DataSourceUserMapper
* add unit test in UserMapper and WorkerGroupMapper
* change cn.escheduler to org.apache.dolphinscheduler
* add unit test in UdfFuncMapperTest
* add unit test in UdfFuncMapperTest
* remove DatabaseConfiguration
* add ConnectionFactoryTest
* cal duration in processInstancesList
* change desc to description
* change table name in mysql ddl
* 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
* 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