powervm: list_instances filtering filters out instances with custom instance_name_template setting

[Mathew Odden]

The list_instances function filter filters out instances with a custom instance_name_template setting. This is due to faultly filtering of the LPAR/instances running on the host.

I think we can just get rid of this since list_instances is really only used to check for the existence of a instance on the host already.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/14015

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/14015
Committed: http://github.com/openstack/nova/commit/b4e9e3ee3917deddc3ae043645b11740fd1e8b8d
Submitter: Jenkins
Branch: master

commit b4e9e3ee3917deddc3ae043645b11740fd1e8b8d
Author: Matt Odden <email address hidden>
Date: Fri Sep 28 21:57:56 2012 +0000

    powervm: remove broken instance filtering

    Filtering isn't necessary (nor desired in some cases)
    Irrelevant comment cleanup

    fixes bug #1061291

    Change-Id: I0798ff20aea7551b1d1100e8a439c39be99291e1