Make NetworkConfigWithAnsible parameter non-role specific

This changes the parameter to non-role specific and by default
true. The dependant python-tripleoclient patch adds a check
to ensure that we only allow usage of old heat nic congigs with
'NetworkConfigWithAnsible: false'.

Change-Id: Ie37bdfe64eb1b33afe326161fc6f99601addb7b5

environments/net-multiple-nics.j2.yaml

@@ -25,5 +25,4 @@ parameter_defaults:
 {%- else %}
   {{role.name}}NetworkConfigTemplate: 'templates/multiple_nics/multiple_nics.j2'
 {%- endif %}
-  {{role.name}}NetworkConfigWithAnsible: true
 {%- endfor %}