* 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

* change escheduler to dolphinscheduler