Do not use prefix to find host in Storwize/SVC driver.

[Avishay Traeger]

Currently, the Storwize/SVC driver creates a host name prefix for host objects on the back-end, and uses that to look up hosts. However, if a host was already created with a different name (for example, manually by an admin), the host creation operation will fail, as a host with that connection information already exists.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/23830

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/23830
Committed: http://github.com/openstack/cinder/commit/e342ff4b509a4184bfa984b467e9cd79b53ed9af
Submitter: Jenkins
Branch: master

commit e342ff4b509a4184bfa984b467e9cd79b53ed9af
Author: Avishay Traeger <email address hidden>
Date: Thu Mar 7 19:18:54 2013 +0200

    Do not use prefix to lookup host in Storwize/SVC.

    Currently, the Storwize/SVC driver creates a host name prefix for host
    objects on the back-end, and uses that to look up hosts. However, if a
    host was already created with a different name (for example, manually
    by an admin), the host creation operation will fail, as a host with
    that connection information already exists. Instead, we look up a host
    based on available connection information.

    Fixes bug: 1149072

    Change-Id: I336dbea85bfaf928a550a15d177e2b9b0ffd38bf