Trusted Filter does not work when Mt. Wilson returns non-ISO formatted dates.

[Christopher MacGown]

The trusted_filter assumes that all OAT attestation servers will return `vtime` in ISO8601 format. This is not the case with the Mt. Wilson attestation server, and there is no way to configure Mt. Wilson to do ship an appropriately formatted `vtime` which prevents trusted hosts from appearing in the available host list for instances booted from a flavor with the trust extra-spec.

It's a pretty trivial change to allow locale-formatted dates to be used in the trusted_filter as well.

[Christopher MacGown (0x44)]

https://review.openstack.org/#/c/112100/

[Christopher MacGown (0x44)]

https://review.openstack.org/#/c/112132/ rather, it seems gerrit doesn't like rebase --onto.

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/112132
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=37918fd8765454a1940c55f9366ef9ef7a0be46f
Submitter: Jenkins
Branch: master

commit 37918fd8765454a1940c55f9366ef9ef7a0be46f
Author: Christopher MacGown <email address hidden>
Date: Tue Aug 5 11:06:14 2014 -0700

    Fix Trusted Filter to work with Mt. Wilson `vtime`

    The Trusted Filter expects that `vtime` is returned from the
    attestation server in an ISO8601 format, but the Mt. Wilson
    attestation server can return it in a locale appropriate string format
    instead. There's no way to configure Mt. Wilson to do the right thing
    so we should just try to parse the returned `vtime` as a string
    formatted date.

    Closes-Bug: #1353029

    Change-Id: Ic7351e0463c014321bdb4fcfeba90ac51460b325