remove hplefthandclient requirement from unit tests

[Mark Sturdevant]

In order to eliminate the need to have the hplefthandclient in the global-requirements project, we need to remove the hplefthandclient from being imported in all hplefthand driver unit tests in cinder.

It should _at least_ be optional for the tests.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/93363

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/93363
Committed: https://git.openstack.org/cgit/openstack/cinder/commit/?id=f2a6e77bc75ea72a374ded4dba82cf2e95c11404
Submitter: Jenkins
Branch: master

commit f2a6e77bc75ea72a374ded4dba82cf2e95c11404
Author: Mark Sturdevant <email address hidden>
Date: Mon May 12 14:27:48 2014 -0700

    eliminate the need for hplefthandclient in tests

    In order to eliminate the need to have the hplefthandclient in the
    global-requirements project, we need to remove the hplefthandclient
    from being imported in all HP LeftHand driver unit tests in cinder.

    Change-Id: I4009ea17b507b1deb2a567dd420f309e15aaf92d
    Closes-Bug: #1316824