Only add internal_api_virtual_ip if InternalApi in network_data

Add's a conditional to only include internal_api_virtual_ip if
InternalApi network is defined in custom networks.

According to code comment internal_api_virtual_ip is only used
by Contrail.

Change-Id: Ifd8f59bd03c9bab1283e580a64957f201eb8f335
Closes-Bug: #1772124

puppet/all-nodes-config.j2.yaml

@@ -1,3 +1,7 @@
+{%- set _networks = [] -%}
+{%- for network in networks -%}
+  {%- set _networks = _networks.append(network.name) -%}
+{%- endfor -%}
 heat_template_version: rocky
 description: 'All Nodes Config for Puppet'
 
@@ -198,8 +202,10 @@ resources:
                   get_param: [NetVipMap, {get_param: [ServiceNetMap, keystone_public_api_network]}]
                 public_virtual_ip: {get_param: [NetVipMap, {get_param: ExternalNetName}]}
                 controller_virtual_ip: {get_param: [NetVipMap, ctlplane]}
+{%- if 'InternalApi' in _networks %}
                 # the internal_api_virtual_ip is needed for contrail only
                 internal_api_virtual_ip: {get_param: [NetVipMap, {get_param: InternalApiNetName}]}
+{%- endif %}
                 network_virtual_ips:
 {%- for network in networks if network.vip|default(false) %}
 # External virtual ip is currently being handled separately as public_virtual_ip.