Updated openstack/openstack
Project: openstack/sahara  2cb641c3a41b1250a0073955c46919d2f3dc22c8

Improved error handling for provisioning operations

1. Removed all error handling in provisioning engine and moved it
   to ops.
2. Implemented general logic on handling with deleted cluster

Implements blueprint error-handling-in-provisioning

Change-Id: Ia161dea1c726bd95157a279eb0f2917af2516b07