Change the AMQP queue when using file backend

These changes make it possible to have glance image sync function
when using a backend store of "file".

When a backend store of "file" is used the glance notification topic
queue will be set to "glance_notifications"; this will override the
"default" attribute.

These change work in conjuction with the glance image sync script:
https://github.com/rcbops/glance-image-sync
updated image-sync script
updated notifications topic block

fixed a cp tech mistake.
add packages
removed image-sync py file
Merge pull request #192 from rackerjoe/v4.2.2rc

Merged automatically by jenkins after successful build test
added role check for single-controller
udpated role lookup
Merge pull request #194 from rackerjoe/v4.2.2rc

Merged automatically by jenkins after successful build test