System reclass model assigns vnc address to control_address variable
which is used for controller node reference, so change it to local
address of the current compute node.
Change-Id: I0c6b8534a1dae516620d0d250944232379a526e0
Signed-off-by: Michael Polenchuk <mpolenchuk@mirantis.com>
(cherry picked from commit 
938cb59719ae412e13be8cb21d8c8b5f51a75826)
       libvirt_bin: /etc/default/libvirtd
       disk_cachemodes: file=directsync,block=none
       vncproxy_url: http://${_param:cluster_vip_address}:6080
+      bind:
+        vnc_address: ${_param:single_address}
       network:
         region: ${_param:openstack_region}
         user: neutron