[block-storage] Need attribute for the host= default attribute in cinder.conf

[Mark Vanderwiel]

Need host= attribute.

https://github.com/openstack/cinder/blob/486fb507918759b9bba605f449a49cef3de00f7e/cinder/common/config.py#L129

cfg.StrOpt('host',
               default=socket.gethostname(),
               help='Name of this node. This can be an opaque identifier. '
                    'It is not necessarily a host name, FQDN, or IP address.'),

For HA and scale environments, this name is tied to the volume usage and would need to be set appropriately.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/180264

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/180264
Committed: https://git.openstack.org/cgit/stackforge/cookbook-openstack-block-storage/commit/?id=c9f1018d9bac666fa4dabefd74caa62317f8db09
Submitter: Jenkins
Branch: master

commit c9f1018d9bac666fa4dabefd74caa62317f8db09
Author: Mark Vanderwiel <email address hidden>
Date: Tue May 5 13:29:08 2015 -0500

    Add host id to cinder default section

    Cinder volumes are associated with the cinder host that created them.
    This unique host id can be changed in the conf file. This patch adds
    support to allow that.

    Change-Id: I9295ed1bfa24bfac8325bd347a92b5e334a31371
    Closes-Bug: #1451967