Consistency Group Support for the Generic Driver

[OpenStack Infra]

https://review.openstack.org/219891

Dear documentation bug triager. This bug was created here because we did not know how to map the project name "openstack/manila" to a launchpad project name. This indicates that the notify_impact config needs tweaks. You can ask the OpenStack infra team (#openstack-infra on freenode) for help if you need to.

commit 079a3d64f5ec02d46285eb4db5343178f395ef5b
Author: Goutham Pacha Ravi <email address hidden>
Date: Thu Aug 27 19:10:15 2015 -0400

    Consistency Group Support for the Generic Driver

    The Generic Driver in Manila has no concept of consistency
    groups. This patch proposes to implement a loose
    consistency group support mechanism for the Generic Driver,
    using existing logic to snapshot shares and create shares
    from snapshots.

    The actions concerning creating and deleting a consistency
    group are handled by the API and the Generic Driver does not
    need to remember any relevant information persistently.

    The actions concerning consistency group snapshots are not
    simultaneous, but are rather let to run in succession.

    DocImpact
    Partially implements bp manila-consistency-groups

    Change-Id: Ie5e51205a1154786f9057691aa82bffcafe04de7