* Use username/password instead of service token for service auth to Keystone
* Updates files/glance-*-paste.ini and files/swift/proxy-server.conf
* keystone_data.sh creates 'service' tenant, 'nova' and 'glance' users
('swift' and 'quantum' if those services are enabled)
* Uses $SERVICE_PASSWORD for the service auth password. There is no default;
to default to $ADMIN_PASSWORD, place the assignment in localrc.
Fixes bug 942983
Change-Id: If78eed1b509a9c1e8441bb4cfa095da9052f9395
b328838104