Fix the TTL issue of subscriptions for MongoDB

[OpenStack Infra]

https://review.openstack.org/270464
Dear bug triager. This bug was created since a commit was marked with DOCIMPACT.
Your project "openstack/zaqar" 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 1d122b1671792aff0055ed5396111cd441fb8269
Author: Fei Long Wang <email address hidden>
Date: Wed Jan 6 10:14:57 2016 +1300

    Fix the TTL issue of subscriptions for MongoDB

    Currently, the TTL of subscriptons doesn't work. That said, after
    the ttl seconds, the subscription can't be deleted. This patch
    also adds a default TTL for subscription. This patch fixes the bug
    and a functional test will be added in Zaqar client.

    APIImpact
    DocImpact

    Partial-Bug: #1529168

    Change-Id: I18e6dd3833f11692775b1285365afbced5725249

[venkatamahesh (venkatamaheshkotha)]

A new config option will be added in this table : https://github.com/openstack/openstack-manuals/blob/master/doc/config-reference/source/tables/zaqar-transport.rst

And is a autogenerated one

Thanks

[KATO Tomoyuki (kato-tomoyuki)]

Already added with batch import for Mitaka.