Object create/destroy/save methods should be remotable

[Thang Pham]

Object create/destroy/save methods should be remotable. This means that if you use volume.save() it will use the stashed context in the object, or if you use volume.save(context) it will use the context passed on. The volume save method is missing the remotable decorator.

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/164764
Committed: https://git.openstack.org/cgit/openstack/cinder/commit/?id=982c423dfefe85d498887d5d57ef6b5c8e4105cf
Submitter: Jenkins
Branch: master

commit 982c423dfefe85d498887d5d57ef6b5c8e4105cf
Author: Thang Pham <email address hidden>
Date: Mon Mar 16 11:48:07 2015 -0400

    Create unit tests for volume objects

    This is a follow up patch to cinder objects that adds
    missing unit tests for volume objects. It also adds
    a @base.remotable decorator to the volume save method,
    which makes sure a context is properly supplied to the
    method, whether it is passed in or taken from the
    context stashed in the object.

    Change-Id: I9febfdf94c4d8c82defedf0ceaec03800552affe
    Implements: blueprint cinder-objects
    Closes-Bug: #1434571