* fix worker group config no effect
* remove codehaus janino jar
the license about janino maybe not compatiable with Apache v2
* Merge remote-tracking branch 'upstream/dev-1.3.0' into dev-1.3.0
# Conflicts:
# dolphinscheduler-server/src/main/resources/config/install_config.conf
* datasource config
* Update datasource.properties
* fix RunConfig bug
* remove param monitor server state
* fix table T_DS_ALERT
* update h2 database
* fix#2910 master server will show exception for some time when it restart
* fix oom when no master is active
* fix worker oom when master server restart
* fix oom
* fix
* add UT
* fix worker group config no effect
* fix singe resource manager will NPE
* Update HadoopUtilsTest.java