Allow some translations to be made.

Transform some action_present and action_past variables from attributes to
methods with the solution proposed in this patch:
https://review.openstack.org/#/c/91338/
Also fix a bug in the solution above where the __init__ function in the
deleteAction class overwrite the action_present and action_past methods.
Closes-Bug: 1366731

Change-Id: I9595f9d5a5a3f1ef4d528ddb3e08737a43471402
Merge "Allow some translations to be made."