While attempting to launch the dashboard, failures are reported about
missing methods like:
2017-05-09 12:11:59.784107 NotImplementedError: The DeleteParameter
BatchAction class must have both action_past and action_present
methods.
I've added two two missing methods.
Change-Id: Ia841aedd62973d0bb52c1a6a82e1c9bd8dc9d47c