Handling of provisioning images has changed on the Tuskar side;
this fix brings Tukskar-UI in line with these changes.
* There used to be separate images for all the deployment roles.
This is no longer the case and all the roles now use the same
image, 'overcloud-full'. As the result, the way the relationship
between images and roles is displayed on the Provisioning Images
page needs to be updated.
* Related to the previous point, test data needed updating to
reflect that.
* Images associated with roles are now saved by name in the Tuskar
plan. This fix ensures that the UI saves and retrieves images
by name and not by UUID, like it used to do.
Change-Id: I11b73fcaed45200dfbdb72dc3ab9a27afb67a31d
a5c32aea36