Fix reclass for designate single service setup

By analogy with other single services - remove
haproxy reclass and change openstack_control_address variable
to single_address_variable. Also pools configuration added, in
order to have ability to do backend specific configuration.

Change-Id: Ib1ec855ddbd7da0442e4cf0e34cf54603f760f21
Related-Prod: OSCORE-267
1 file changed