* 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
* add ConnectionFactoryTest and ConnectionFactory read datasource from appliction.yml
* .escheduler_env.sh to dolphinscheduler_env.sh
* dao yml assembly to conf directory
* table name modify
* entity title table name modify
* add ConnectionFactoryTest and ConnectionFactory read datasource from appliction.yml
* .escheduler_env.sh to dolphinscheduler_env.sh
* dao yml assembly to conf directory
* table name modify
* 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
* rename from DatasourceUserMapper to DataSourceUserMapper
* add unit test in UserMapper and WorkerGroupMapper
* change cn.escheduler to org.apache.dolphinscheduler