re-add glanceconfig to role::keystone::server

mysteriously disappeard on the rebasing of
I5971cad7ef9cf6 between PS1 and 2

needs to be-readded to unbreak puppet run

Must pass glanceconfig to Class[Role::Keystone::Server]

Change-Id: Icb53f39e7840e8aa8f01f808eb83496d2c3f443b