Add support for enhanced features to the QNAP Cinder driver

[OpenStack Infra]

https://review.openstack.org/470188
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 08dcf03541995cc9f8a22232bf738967e4b6570b
Author: Pony Chou <email address hidden>
Date: Fri Jun 2 15:49:21 2017 +0800

    Add support for enhanced features to the QNAP Cinder driver

    This adds enhanced supports to the QNAP Cinder driver:
     - CHAP
     - Thin Provision
     - SSD Cache
     - Dedupe
     - Compression

    DocImpact
    Implements: blueprint qnap-enhance-support

    Change-Id: I2a7440789753bb0e42ac0e8d0190b21652a87e2f

[Gorka Eguileor (gorka)]

This was released a while ago https://review.opendev.org/#/c/470188/