Updated openstack/openstack
Project: openstack/nova  28741163f4a7deabd28dae194b404fbf99fdf1be
null
Reverse the quota reservation in revert_resize

If concurrent revert_resize requests happen, the second request
will fail because of save failure. In such situation, we should
revert the reservation.

Change-Id: I90f4189ec385ea323e62312e519ae65ec58cca66
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>