Add integration for manila-netapp backend

[Marios Andreou]

this is for tracking the work needed to land manila-netapp for newton

currently tht https://review.openstack.org/#/c/354019/ and puppet-tripleo @ https://review.openstack.org/#/c/354014

This includes a tidy up puppet-tripleo side for removing the duplication of config.

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/354019
Committed: https://git.openstack.org/cgit/openstack/tripleo-heat-templates/commit/?id=98b47767478eda2c940098217e93ec3567fa9f36
Submitter: Jenkins
Branch: master

commit 98b47767478eda2c940098217e93ec3567fa9f36
Author: marios <email address hidden>
Date: Thu Aug 11 14:30:04 2016 +0300

    Add NetApp Manila driver integration and tidy up generic

    Enables configuring a NetApp backend for the Manila service
    This was created based on the review at
    https://review.openstack.org/#/c/188138/

    This makes the netapp and generic backends disabled by default
    in the services/manila-backend-*.yaml. A backend is then
    enabled via backend-specific environment files, which will set
    any config parameters and enable that backend.

    It is expected that multiple manila backend specific environment
    files might be specified simultaneously.

    Finally generic and manila config is split into separate
    service files rather than using manila-base for all the things.

    Co-Authored-By: Ryan Hefner <email address hidden>
    Co-Authored-By: Ben Swartzlander <email address hidden>
    Closes-Bug: 1618479
    Depends-On: Ic6f8e8d27ca20b9badddea5d16550aa18bff8418
    Change-Id: I35fce32d0f6a5cc1c3382c2d0e0d6028928fd943