Comment 7 for bug 1603034

Reviewed: https://review.openstack.org/342301
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=3a61ae35d4b713f423219c7b714126e1584694e8
Submitter: Jenkins
Branch: master

commit 3a61ae35d4b713f423219c7b714126e1584694e8
Author: Matt Riedemann <email address hidden>
Date: Thu Jul 14 13:37:05 2016 -0400

    Validate pci_passthrough_whitelist when starting n-cpu

    Loading up CONF.pci_passthrough_whitelist in the Whitelist
    object performs a bunch of validation and can fail in several
    different ways (invalid json, invalid values, invalid combinations
    of keys, devices not found, etc). This happens today when
    creating the PciDevTracker in the ResourceTracker when updating
    available resources. If the configuration is bad, it kills the
    periodic task to update available resources on the compute node.

    We should just load up the pci_passthrough_whitelist (if set)
    when starting the nova-compute service so we can fail fast and
    kill the service on any misconfiguration rather than run with
    a broken service.

    Change-Id: If50fb837b490042bb5ef20e9ad843b28f871a44e
    Closes-Bug: #1603034