Remove extra exit 0

The exit 0 is not recommended:
- If this script is forked, it will exit 0 anyway, so the exit
  is useless
- If this script is in the same shell, it will exit current fork
  with no valid reason

Change-Id: Id86af084e0c93856986814b14ad55c4bc8c8e613

leap-upgrades/run-stages.sh

@@ -33,4 +33,3 @@ source re-deploy.sh
 echo -e "\n====================================================="
 notice "All OpenStack-Ansible Leaps successful."
 echo -e "=====================================================\n"
-exit 0