[DOC]Add QNAP Manila Driver

[OpenStack Infra]

https://review.openstack.org/394703
Dear bug triager. This bug was created since a commit was marked with DOCIMPACT.
Your project "openstack/manila" 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 cf182947b7018d46ef34489b5cfc3fe0dee76f55
Author: Pony Chou <email address hidden>
Date: Sat Oct 1 02:28:51 2016 +0800

    Add QNAP Manila Driver

    This driver supports below features:
     - Create NFS Share
     - Delete NFS Share
     - Allow NFS Share access (IP access type)
     - Deny NFS Share access
     - Create snapshot
     - Delete snapshot
     - Create share from snapshot
     - Extend share
     - Manage share
     - Unmanage share
     - Manage snapshot
     - Unmanage snapshot

    DocImpact
    Implements: blueprint qnap-manila-driver

    Change-Id: I4e4278a870af7be1c026385b85ea309b2d1773a9

[Goutham Pacha Ravi (gouthamr)]

The QNAP driver was added in the Queens release. However, no documentation was added in the administrator guide (https://docs.openstack.org/manila/latest/admin/index.html#supported-share-back-ends) or the configuration reference (https://docs.openstack.org/manila/latest/configuration/shared-file-systems/drivers.html)

Added Pony Chou and Chris Yang who worked on this driver at some point. If you think this documentation can be added, please claim this bug and add the necessary docs. Thanks!

[Launchpad Janitor (janitor)]

[Expired for OpenStack Shared File Systems Service (Manila) because there has been no activity for 60 days.]