Comment 4 for bug 1515670

Reviewed: https://review.openstack.org/261109
Committed: https://git.openstack.org/cgit/openstack/neutron-vpnaas/commit/?id=1afd7fc22acc36ae40af6b573940f02ea970a20f
Submitter: Jenkins
Branch: master

commit 1afd7fc22acc36ae40af6b573940f02ea970a20f
Author: Akihiro Motoki <email address hidden>
Date: Thu Dec 24 06:34:52 2015 +0900

    Make VPN endpoint groups aware from API

    There is no way to check whether the VPN endpoint groups feature
    is available without sending an API request at now.
    This commit split VPN endpoint groups feature as an extension.
    By doing so, API consumers including Horizon can know the feature
    is available through Neutron extension list API.

    Note that this commit touches only the API layer and does not
    touch the DB layer because the endpoint groups feature is
    the first citizen of VPNaaS API.

    Closes-Bug: #1515670
    Change-Id: I82a3ab60b5a50eee2b4a84b54829a323cd2b3fb1