Fix failing Glance expect test on master

This PR is to fix the Glance v1 API Expect test failures on the master branch. Glance is very much in flux at the moment with the v1 and v2 APIs, and there are several outstanding PRs that need to be revisited :

https://github.com/jclouds/jclouds-labs-openstack/pull/77
https://github.com/jclouds/jclouds-labs-openstack/pull/82