services.py index() missing action=index for authorization

[Anna Sortland]

cinder/api/contrib/services.py does not pass action for 'index':
  authorize(context)
Instead, it should call:
   authorize(context, action='index')
similarly to how update() calls "authorize(context, action='update')".

The corresponding rule should also be added to sample /etc/cinder/policy.json:
   "volume_extension:services:index" : "rule:admin_api"

[Anna Sortland (annasort)]

update() is missing action as well in the community code, will add it there too.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/201776

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/201776
Committed: https://git.openstack.org/cgit/openstack/cinder/commit/?id=68ec9d7b7fb5fcd8b1e80e0121c8079d69f8fb4d
Submitter: Jenkins
Branch: master

commit 68ec9d7b7fb5fcd8b1e80e0121c8079d69f8fb4d
Author: Anna Sortland <email address hidden>
Date: Tue Jul 14 14:51:51 2015 -0500

    Update authorization actions for services API

    Previously, the services extension used generic authorization check
    "volume_extension:services" for both index and update APIs.

    This change creates separate rules for index and update APIs
    so that it is possible to assign different rules to different users.
    The sample /etc/cinder/policy.json is also updated to include new rules:
        "volume_extension:services:index": "",
        "volume_extension:services:update" : "rule:admin_api"

    Change-Id: Ib57171f5011210861478590bbdfc30cce25e62b4
    Closes-Bug: #1471995
    Closes-Bug: #1471999