Support 'is-public' property for cinder volumetype

[huangtianhua]

Support 'is-public' property for cinder volume to specify whether the volumetype is public or not.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/189172

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/189172
Committed: https://git.openstack.org/cgit/openstack/heat/commit/?id=65a45d2b6392aefac482a0cf9beb79e35fc9be7c
Submitter: Jenkins
Branch: master

commit 65a45d2b6392aefac482a0cf9beb79e35fc9be7c
Author: huangtianhua <email address hidden>
Date: Mon Jun 8 10:45:05 2015 +0800

    Add 'is_public' property for cinder volume type

    Add property 'is_public' for OS::Cinder::VolumeType
    resource to allow specify whether the volume type
    is accessible to the public.

    Change-Id: Ie4b07fc9f3c97ecb808c9d4e0fc04a6d6f4846e8
    Closes-Bug: #1459895