* 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
* 增加工作流导出导入功能,前端定时器表达式的秒和分钟的默认值从*修改成0
* 修改工作流导出导入功能由excel改为json减少依赖
* [BUG][#731]repair swagger annotation ,interface path:/escheduler/projects/{projectName}/process/batch-delete and /escheduler/projects/{projectName}/process/delete
* [BUG][#771] The edit timer did not assign the original data
* [FEATURE][#236] Cross-project dependency
* [FEATURE][#236] Cross-project dependency(增加跨项目依赖)
* 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
* add druid connection provider in order to change quartz default connection pool
* remove c3p0 in escheduler-api and escheduler-dao
* change method name queryByIdAndIp to queryBySessionId and queryByUserIdAndIp to queryByUserId
* change connectionProvider.class from c3p0 to druid
* change connectionProvider.class from c3p0 to druid
* bug fix #688,a user generated multiple ip session, the query error (#689)
* Dockerfile update
* worker code optimization
* filtering the log of one task to the log of another task