Set the correct URLs in the version return data

The URLs advertised in the data returned by keystone's '/' route default
to localhost and is not usable from off-host.  Not that anything in
DevStack uses it (yet).

Change-Id: I049789f568eff48c1abb0678c3ac0ae8a8960c64
Add identity v3 exercise

Change-Id: I23007852113575a9249670e7315aac667dfb61d5
Merge branch 'keystone-version-links' into dt-test
Merge branch 'v3-exercise' into dt-test
Merge branch 'screen-stop' into dt-test
Merge branch 'update-usb-tools' into dt-test