With the recent introduction of the identity_uri in keystoneclient,
there is a small backward incompatible change which means that weird
protocols like the ones we use during tests aren't support properly
anymore. The patch replaces "foottp" and "barttp" by "file" hopefully
keeping testing coverage the same.
Change-Id: Idb30ff3ee0ca50911e453899ad32e630f9b18724
Closes-Bug: #1309092