openstack client for keystone v3. Maintain sessions upon class reload with persistent_info
openstack client for keystone v3. Maintain sessions upon class reload with persistent_info

Change-Id: I8528b89d233a6417a840bc339816e618588851f2
Signed-off-by: tierno <51bab9660ca99329005a6d64fa97d56da061cb58@telefonica.com>

igordcard/RO,igordcard/RO