updated translations

Commands run:-
$ python setup.py extract_messages
$ python setup.py update_catalog --no-fuzzy-matching \
  --ignore-obsolete=true
$ source \
  ../openstack-infra/project-config/jenkins/scripts/common_translation_update.sh
$ setup_loglevel_vars
$ cleanup_po_files glance

Change-Id: If1bdff3f7330c3eb58bd56b08299472ae3d4b552
Merge "updated translations" into proposed/juno