Fix executing hadoop command with hadoop user instead of root user
Fix executing hadoop command with hadoop user instead of root user

Root user cannot execute hadoop command
because hadoop v2 command path is changed from hadoop v1.

Change-Id: Iefcfbf6ccf3db0fe134c182ffc5657d5c7cf9db3
Closes-Bug: 1375839

bigfootproject/sahara-image-elements,openstack/sahara-image-elements,uladz/sahara-image-elements,crobby/sahara-image-elements,bigfootproject/sahara-image-elements,uladz/sahara-image-elements,openstack/sahara-image-elements,crobby/sahara-image-elements