CG driver interface should be changed so that driver doesn't have to access db

[Xing Yang]

Currently the following CG driver interfaces don't pass in volumes or snapshots to the driver. As a result, drivers have to retrieve info from db. These interfaces should be changed so that drivers don't have to access db.

create_consistencygroup
delete_consistencygroup
create_cgsnapshot
delete_cgsnapshot

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/229580

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/229580
Committed: https://git.openstack.org/cgit/openstack/cinder/commit/?id=f18cb6374e68e4d904125e9d99b809354fbdf9ee
Submitter: Jenkins
Branch: master

commit f18cb6374e68e4d904125e9d99b809354fbdf9ee
Author: Xing Yang <email address hidden>
Date: Tue Aug 25 00:46:53 2015 -0400

    CG driver function should not access db

    Currently the following CG driver interfaces don't pass in volumes
    or snapshots to the driver. As a result, drivers have to retrieve info
    from db. In this patch, these interfaces are changed so that drivers
    don't have to access db.

    Removing the access to db from driver CG functions will be handled by
    separate patches.

    * create_consistencygroup
    * delete_consistencygroup
    * create_cgsnapshot
    * delete_cgsnapshot

    Change-Id: I63287fd43927fc09dad77292ecfe561917f7bda5
    Closes-Bug: #1501466

[Thierry Carrez (ttx)]

This issue was fixed in the openstack/cinder 8.0.0.0b1 development milestone.