Add read_affinity and write_affinity swift settings

[Nolan Brubaker]

For a given proxy node, the read_affinity and write_affinity variables should be present so that an existing region can be specified for that proxy to use.

[Nolan Brubaker (nolan-brubaker)]

This relies on https://bugs.launchpad.net/openstack-ansible/+bug/1415171 being finished first.

[Darren Birkett (darren-birkett)]

master review: https://review.openstack.org/#/c/191023/

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/195234
Committed: https://git.openstack.org/cgit/stackforge/os-ansible-deployment/commit/?id=c1634b2e328af1bd5c535d750bd60d09d649d3c0
Submitter: Jenkins
Branch: kilo

commit c1634b2e328af1bd5c535d750bd60d09d649d3c0
Author: Andy McCrae <email address hidden>
Date: Fri Jun 12 12:47:49 2015 +0100

    Add read/write_affinity settings for Swift

    Allow the setting of read/write_affinity and write_affinity_node_count
    on a per proxy_host basis.

    This allows the deployer to set preferences for which region to
    read/write to, which can increase the efficiency of a multi-region
    swift cluster.

    Sample swift.yml has been updated, as well as the aio swift.yml to
    ensure these settings are setup as part of the gate, but this shouldn't
    change the functionality of swift at all (since there is only 1 region).

    Change-Id: I95b456672f419fcc331d6739ce259b022d350472
    Closes-Bug: #1415172
    (cherry picked from commit 5b9b49f52b12052f93c72f44a31a972f2e98620c)

[Davanum Srinivas (DIMS) (dims-v)]

This issue was fixed in the openstack/openstack-ansible 11.2.11 release.

[Doug Hellmann (doug-hellmann)]

This issue was fixed in the openstack/openstack-ansible 11.2.12 release.

[Davanum Srinivas (DIMS) (dims-v)]

This issue was fixed in the openstack/openstack-ansible 11.2.14 release.