Updated openstack/openstack
Project: openstack/neutron  22886eb49f3d1d04888168e2705a00ef733ac4bc
null
Switch to using spawn to properly treat errors during sync_state

Changes f1b9ac5a and 9f6ff7e3 were aimed at improving the robustness
of the sync_state method. However both missed switching from spawn_n
to spawn to properly deal with raised exceptions.

Change-Id: Ieda4a5ecca63de67d8a9757962e7e3383fd9c9ea
Related-bug: #1257514
Updated openstack/openstack
Project: openstack/heat  474e6e3b97500a433bf20059b5b6a636386d2f5a
null
Utilize stack-lock for multi-engine support

Utilize a distributed stack lock to avoid race conditions when multiple
engines are deployed.

Blueprint multiple-engines

Change-Id: I2278c7922557b6234cd7ff162cea92af83e9fb8b