core: RemoveImageCommand - missing constructor

RemoveImageCommand - added a ctr that accepts parameters class.
In bug context, needed for invocation on RemoveDiskCommand
by 'runInternalActionWithTasksContext'.

Change-Id: Ib55837af6ab49ebfd5202c4dc272a73e467f3f14
Bug-Url: https://bugzilla.redhat.com/1121379
Signed-off-by: Daniel Erez <derez@redhat.com>