Instance reschedule elevates to admin context

[Vish Ishaya]

Some resources should not be available when launching an instance (networks that belong to other projects for example). For this reason the original context should be maintained when rescheduling an instance. Currently the second launch occurs with an elevated context.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/119470

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/119470
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=3920787065f5570501035a7e59e2c5d427e2568d
Submitter: Jenkins
Branch: master

commit 3920787065f5570501035a7e59e2c5d427e2568d
Author: Vishvananda Ishaya <email address hidden>
Date: Fri Sep 5 13:21:05 2014 -0700

    Don't elevate context when rescheduling

    The rescheduled launch should be executed with the same context
    as the original request, so make sure that we aren't passing an
    elevated context to reschedule.

    Change-Id: Ic528f10067fa2977cc375c41b9c65d3517524ff8
    Resolves-bug: 1366181