Updated openstack/openstack
Project: openstack/neutron  1283c353e4e4caecaca79db0c3e8dfe4041eff24

Added note to neutron.conf

Added note to neutron.conf which clarifies where database
connection attribute should be set.

Change-Id: Ic0631cff789046528cae8622d935b65ae9b012cb
Closes-Bug: #1261298