in instances column Task None is not tranlsated

[Doug Fish]

In both
project->compute->instances and
admin->system->instances
the value "None" for the Task column is not translated.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/134638

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/134638
Committed: https://git.openstack.org/cgit/openstack/horizon/commit/?id=a60fa55a70de9747b6db68d7e122f5b285596361
Submitter: Jenkins
Branch: master

commit a60fa55a70de9747b6db68d7e122f5b285596361
Author: Doug Fish <email address hidden>
Date: Fri Nov 14 14:04:45 2014 -0600

    Make Task state translatable.

    The Task state None is currently not translated because it is the
    literal value None. Update to make sure it gets displayed as translated.
    Also add in other missing task_states: 'reboot_pending', 'reboot_started',
    'reboot_pending_hard', 'reboot_started_hard'

    Change-Id: I4f9f8d22711896b2e9d39ef1bf5e803ca7bcbc0a
    Closes-Bug: #1392848