PCI device object should be purely DB layer

[jiang, yunhong]

Currently the PCI device object includes a lot of function like alloc/free/claim etc. However, the NovaObject should not be used this way, and it makes the PCI device object really different with other NovaObject implementation.

We should keep the PCI device object as simple data access, and keep those method to separated functions.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/69731

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/69732

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/69733

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/69731
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=ba637a177aa5bdefa4b6db9a062e8c0ece0b597b
Submitter: Jenkins
Branch: master

commit ba637a177aa5bdefa4b6db9a062e8c0ece0b597b
Author: Yunhong Jiang <email address hidden>
Date: Mon Jan 27 14:50:33 2014 -0800

    Separate the PCI device object handling code

    Currently the PCI device object includes several functions like
    alloc/free/claim etc. However, the NovaObject should not be used
    this way, and it makes the PCI device object really different
    with other NovaObject implementations.

    This patch duplicates the PCI device handling code as separated
    functions. No logic changes but simply code copy. A later patch
    will delete the code at PciDevice object.

    Closes-Bug: #1273852

    Change-Id: I2389d29218d8619998f8df973004af004e8b1b76

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/69732
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=c42a22a07925e21770adf486c1904eacdff308ec
Submitter: Jenkins
Branch: master

commit c42a22a07925e21770adf486c1904eacdff308ec
Author: Yunhong Jiang <email address hidden>
Date: Mon Jan 27 17:59:00 2014 -0800

    Use new pci device handling code in pci_manager

    As we remove some pci device method from PCI device object,
    update the pci manager accordingly.

    Closes-Bug: #1273852

    Change-Id: I0ec0e7b03625888a207918816b6e2d537b6d7d54

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/69733
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=60ca9548905b58cea67776a71864486bfd1d69c7
Submitter: Jenkins
Branch: master

commit 60ca9548905b58cea67776a71864486bfd1d69c7
Author: Yunhong Jiang <email address hidden>
Date: Tue Jan 28 09:59:53 2014 -0800

    Remove the device handling from pci device object

    Remove the device handling code at pci device object to make
    it similar to other NovaObject.

    Remove some usage in test cases.

    Closes-Bug: #1273852

    Change-Id: I4487ae0b36de18365d12593f480c05f0fe726769