Updated openstack/openstack
Project: openstack/nova  b8e39028812de9088ae8e3c929c6dc7ff0c4a99f

Handle InstanceUserDataTooLarge at api layer

compute layer might raise InstanceUserDataTooLarge exception,
this patch catches the exception at API layer and handle it.

Closes-Bug: #1338473

Change-Id: I881e526eaa51ab28316f643430d904f620123d56