Remove deprecated code

Essex and keystoneclient 0.1.1 have deprecated and is no
longer supported by the Openstack project so remove
the keystoneclient tests for them.

Change-Id: Ia083ecbfa8e488fd33eb3e8c47fc532196de7ca8
Signed-off-by: Chuck Short <chuck.short@canonical.com>
Merge "Remove deprecated code"