* merge hadoop.properties into common.properties

* merge hadoop,zookeeper.properties into common.properties
remove combined.properties/master.properties/worker.properties

* change db user/pwd to test/test

* rename .dolphinscheduler_en.sh to dolphinscheduler_env.sh
remove some unused in install.sh

* add out put log when master/worker server start...

* add start log when servers start