With change to use the correct "service" role for service users,
they can no longer create public images.
For this recipe, need to use admin for public images.
Added a public flag to the lwrp such that other non-admin
accounts can create images. Made a note in the client cookbook
patch that this support needs to be merged in there.
Change-Id: I99e2febfdbf6f4bab260d897216f4ae768cf3315
Related-Bug: #1436050
Closes-Bug: #1441292
1600d6a14d