More robust atmo-init handling of groups, sudoers and ssh config.
Check to see if the user name is in sudoers or groups. If it isn't then
add it.

	modified:   init_files/30/atmo-init-full.py
	modified:   init_files/30/atmo-initer.rb
	modified:   service/tasks/driver.py
Merge branch 'master' of github.com:iPlantCollaborativeOpenSource/atmosphere