Harden the xinetd security
Harden the xinetd security

In galera_server role we allow anyone to know galera state, from
any network by default. We change this behavior here, to allow
only the nodes from galera_all and haproxy_all to query the
galera state.

Change-Id: Ieb3a8315a7599f850ba922da4c782230bd850125

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