Unity: Attach Unity volume via IPv6.

[OpenStack Infra]

https://review.openstack.org/529454
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 6171655d39b3bd0f242f6aae08421bc55d7ee80c
Author: Jichao Zhang <email address hidden>
Date: Mon Dec 18 16:02:50 2017 +0800

    Unity: Attach Unity volume via IPv6.

    The IPv6's ISCIS portal format is [IPv6Address]:Port.
    The Unity returned IPv6 are not enclosed with brackets.
    So Unity's cinder-driver has to add brackets for IPv6's ISCSI portal.

    DocImpact
    Change-Id: Ib54fe948d0f5d7cad6c28468503f8535573ef3fc
    Implements: blueprint unity-cinder-ipv6

[Sean McGinnis (sean-mcginnis)]

Please use this to track your documentation update.