Subscription update in Redis driver doesn't pack new options in msgpack

[Eva Balycheva]

What happens:
If you try to update subscription in Redis and specify new options, these options will be written to database in plain text format instead of msgpack format.
Then, if you try to get this subscription, Zaqar will just return response with code 503.

Proofs:
Curl requests:
http://paste.openstack.org/show/aCCiZAntO4okXz2RgO90/

Part of Zaqar's log during get request:
http://paste.openstack.org/show/3mCl6Mnpv3zSCmAybzyQ/

Possible solution:
Make Zaqar on subscription update operation pack options in msgpack format before sending it to Redis database.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/290170

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/290170
Committed: https://git.openstack.org/cgit/openstack/zaqar/commit/?id=146e37c70f0bb765b7f467c2b3ad2d1754e264db
Submitter: Jenkins
Branch: master

commit 146e37c70f0bb765b7f467c2b3ad2d1754e264db
Author: Eva Balycheva <email address hidden>
Date: Wed Mar 9 01:37:57 2016 +0300

    Fix updating subscription options in Redis driver

    Now, if you try to update subscription in Redis and specify new options,
    these options will be written to database in plain text format instead
    of MessagePack format.
    Then, if you try to get this subscription, Zaqar will return response
    with code 503. Internally Zaqar will experience a problem while trying
    to unpack subscription's options.

    This patch makes Redis driver on HTTP PATCH method pack subscription
    options in MessagePack format, before sending changes to database.

    Change-Id: Ic3940b5093021c0d0cc5c345acabe29804d5a291
    Closes-Bug: 1554683

[Doug Hellmann (doug-hellmann)]

This issue was fixed in the openstack/zaqar 2.0.0.0rc1 release candidate.