Allow the haproxy configuration to run with limited groups
Allow the haproxy configuration to run with limited groups

The haproxy config we have makes a couple assumptions about groups being
present. this change simply improves our existing config so that it
works should a deployer omit common groups within a deployment.

Change-Id: Iae3798c98c250e959f660603263405aa88a4e1a1
Signed-off-by: Kevin Carter <ffb54fded2f22052678e45d78b58d223654eb6fa@rackspace.com>

stackforge/os-ansible-deployment,bunchc/openstack-ansible,bunchc/openstack-ansible,cfarquhar/openstack-ansible,stackforge/os-ansible-deployment,openstack/openstack-ansible,openstack/openstack-ansible,cfarquhar/openstack-ansible