Support Zaqar subscription

[Zane Bitter]

Zaqar supports creating a Subscription to a queue with various notification sinks (e.g. email, webhook, trigger Mistral workflow). We should add an OS::Zaqar::Subscription resource to Heat to allow a user to configure this from within a template.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/392315

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/392315
Committed: https://git.openstack.org/cgit/openstack/heat/commit/?id=073222e11fda71c496349c571ac57e8cc4f398f7
Submitter: Jenkins
Branch: master

commit 073222e11fda71c496349c571ac57e8cc4f398f7
Author: Jason Dunsmore <email address hidden>
Date: Fri Oct 28 16:08:18 2016 -0500

    Add OS::Zaqar::Subscription resource

    Closes-Bug: #1628693
    Change-Id: Ifb15bdfea2ff04c1f0fb1f890582c7e9d12b6db9

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/heat 8.0.0.0b1 development milestone.

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/404440
Committed: https://git.openstack.org/cgit/openstack/heat/commit/?id=ec7abd0f208b903c4646112960e631d5f0ddf957
Submitter: Jenkins
Branch: master

commit ec7abd0f208b903c4646112960e631d5f0ddf957
Author: Zane Bitter <email address hidden>
Date: Wed Nov 30 14:44:13 2016 -0500

    Add an OS::Zaqar::MistralTrigger resource type

    This simplifies the task of having Mistral subscribe to a Zaqar queue
    (compared to using the OS::Zaqar::Subscription resource type) by
    automatically filling in the correct subscriber URL from the Keystone
    catalog, and also making the required options explicit in the properties
    schema.

    Change-Id: I915297b3d0ce70bafa6ca0f3854668e88d4475b1
    Related-Bug: #1628693