[1/4]Reset generic volume group status

[OpenStack Infra]

https://review.openstack.org/389091
Dear bug triager. This bug was created since a commit was marked with DOCIMPACT.
Your project "openstack/cinder" is set up so that we directly report the documentation bugs against it. If this needs changing, the docimpact-group option needs to be added for the project. You can ask the OpenStack infra team (#openstack-infra on freenode) for help if you need to.

commit 15c555445bb61ec856ce3b0b9d3fb90df00d349f
Author: TommyLike <email address hidden>
Date: Thu Oct 20 17:30:31 2016 +0800

    [1/4]Reset generic volume group status

    Currently the administrator could only reset the generic group
    status by db operation,this change intends to add new admin
    actions to achieve these.

    The patch list:
        1. group API(this).
        2. group snapshot API(https://review.openstack.org/#/c/389577/).
        3. cinder client(https://review.openstack.org/390169/).
        4. documentation(https://review.openstack.org/#/c/395464).

    APIImpact
    DocImpact
    Partial-Implements: blueprint reset-cg-and-cgs-status

    Change-Id: Ib8bffb806f878c67bb12fd5ef7ed8cc15606d1c5

[Sheel Rana (ranasheel2000)]

Dear hu-husheng,

Kindly add doc section.

[Hanxi Liu (hanxi-liu)]

the doc has been added in https://review.openstack.org/#/c/395464