Update 'action_not_allowed' message to be more generic

Currently, if a user performs a BatchAction that is not
allowed, a 'You do not have permission' message is
returned.  However, there may be other reasons why
an action is disallowed (an object in a non-deletable
state, for instance).  This patch genericizes the
'not allowed' message.

Closes-Bug: #1173870
Change-Id: I4bb58afd1442edd719750b0d325cc7efa14026e3
Merge "Update 'action_not_allowed' message to be more generic"