Updated openstack/openstack
Project: openstack/nova  6834e9149a7bfc06baff768f4ff821829814f5c1
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Retry reservation commit and rollback on deadlock

Reservations can deadlock when concurrent commits are run from
multiple hosts on the same project. This fixes the issue by using
our convienient retry on deadlock feature.

Change-Id: I31d74f4267eaa33e798de926069d1a0f63006a59
Closes-bug: #1274341