Rename tasks
Created by: riyad
Rename rake tasks to be more consistent:
- rename
gitlab:app:backup_*
togitlab:backup:*
- rename
gitlab:app:enable_automerge
togitlab:enable_automerge
- rename
gitlab:activate_namespaces
togitlab:enable_namespaces
- put
add_user*_to_project_teams
bulk user import tasks undergitlab:import:...
- add
gitlab:satellites:create
for clarity