Service chain ip only for internal use

Set service chain ip for internal use only and not return
the ip address as part of neutron/nova queries. Only the
non service-chain ips should be used for booting up the VM.

Change-Id: Ic3b5d70cb8b70a1db0d550b2074383a0208316fd
Closes-Bug: #1548942

src/config/vnc_openstack/vnc_openstack/neutron_plugin_db.py

@@ -2067,6 +2067,9 @@ def _port_vnc_to_neutron(self, port_obj, port_req_memo=None):
                     except NoIdError:
                         continue
 
+                if ip_obj.get_service_instance_ip():
+                    continue
+
                 ip_addr = ip_obj.get_instance_ip_address()
 
                 ip_q_dict = {}