Add replication failback in Kaminario K2 drivers

[OpenStack Infra]

https://review.openstack.org/356475
Dear bug triager. This bug was created since a commit was marked with DOCIMPACT.
Your project "openstack/cinder" 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 4e92c272eb3921d9154a6b01fc7ccd9c7ebec661
Author: VenkataKrishna Reddy <email address hidden>
Date: Wed Aug 17 09:32:05 2016 -0400

    Add replication failback in Kaminario K2 drivers

    Replication failback support is added based on active_backend_id
    in Kaminario K2 iSCSI and FC Cinder drivers.
    Use "cinder failover-host" command to switch between failover and
    failback based on active_backend_id.
    If active_backend_id is secondary array, "cinder failover-host"
    will trigger failback code.
    Below are the steps as part of failback:
    1)Search "failed-over" sessions on secondary array.
    2)Change state of "failed-over" sessions to "in-sync".
      This will reverse the replication direction from secondary
      to primary.
    3)Create external snapshots and synced to primary array volumes
    4)Change state of "in-sync" sessions on primary to "failed-over".
    5)Change state of "failed-over" sessions to "in-sync".
      This will reverse the replication direction from primary to
      secondary.

    Also, updated releasenotes of bug #1608913
    DocImpact
    Closes-Bug: #1615178
    Co-Authored-By: Nikesh Mahalka<email address hidden>
    Co-Authored-By: Sreedhar Varma<email address hidden>
    Co-Authored-By: Lakshman<email address hidden>
    Co-Authored-By: Ido Benda<email address hidden>
    Change-Id: I664516ab31f9d33e4d14cd8615a1e0da4dba15b6

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/360741
Committed: https://git.openstack.org/cgit/openstack/openstack-manuals/commit/?id=8929bca3ad42ace9ad0dbcbe22dfb253f2029808
Submitter: Jenkins
Branch: master

commit 8929bca3ad42ace9ad0dbcbe22dfb253f2029808
Author: Nikesh Mahalka <email address hidden>
Date: Thu Aug 25 15:18:48 2016 -0400

    Configuring Kaminario Cinder drivers

    Change-Id: I3514248eedd365cb5f9ce8ee82323551f789df65
    Closes-Bug: #1608951
    Closes-Bug: #1597518
    Closes-Bug: #1616455
    Closes-Bug: #1593888
    Co-Authored-By: Lakshman<email address hidden>

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/openstack-manuals 15.0.0 release.