Updated openstack/openstack
Project: openstack/taskflow  1b0618338c5eb70116cc056b31d83c18d90eac59

Add a 'can_be_registered' method that checks before notifying

Add a new method that can be used to check if a event type is
allowed to trigger a notification; and initially use it to
disallow the 'ANY' meta event type from being used to trigger
notifications.

Change-Id: I842fcc5d3e06f69a9479b60b3b89a24233171cfb