update hadoop screen to include uid/gid related to hadoop install
merged comit from master 3eea5e3 (hadoop screen include uid/gid)
Merge remote-tracking branch 'origin' into 3.1.x
added usermod -d /home/hadoop hdfs to osg-server.xml to fix modification done by 'rocks sync user'
fix /home/hadoop done by 'rocks sync user' from 5209524
Merge remote-tracking branch 'origin' into 3.1.x