The pci manager try to modify the pci device list

[jiang, yunhong]

Currently the ObjectList is mostly immutable, i.e. although the items in the list is changable, but the list itself should not be add or remove.

However the PCI manager use a ObjectList to track all the devices in the host and may add/remove, this is not correct. We should not use the Object List but a simple list to track all the devices.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/69730

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/69730
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=81f9256747377f1b9488b407a2f33d251ffd1d8f
Submitter: Jenkins
Branch: master

commit 81f9256747377f1b9488b407a2f33d251ffd1d8f
Author: Yunhong Jiang <email address hidden>
Date: Mon Jan 27 17:18:46 2014 -0800

    Remove PciDeviceList usage in pci manager

    Pci manager keeps a PciDeviceList and even try to append
    object to the list. This is not correct, as the ObjectList
    is designed as immutable, although the objects in the list is
    mutable. We should simply use a list to keep devices.

    Closes-Bug: #1273803

    Change-Id: Ie80b6f5f47a1d2d2e20aadb4779be142c17b5b38