Use template for NetworkConfig script

Use the first_found Ansible lookup plugin to look for the NetworkConfig
script in both the role directory and server directory. This allows for
using a role generic NetworkConfig script in the role dir, while still
being backwards compatible.

The NetworkConfig script is also rendered from a template on the remote
node instead of just copied. Treating it as a template allows it to be
made generic per role instead of node specific.

Depends-On: I6bbca8eb256f387c4f74378baa5253890cfe1abf
Change-Id: Ibbb5dd2ccbdaec083ec636ac44dfdc75b65f89a7

common/deploy-steps.j2

@@ -561,9 +561,13 @@ outputs:
                 - name: Check NetworkConfig script existence
                   local_action:
                     module: stat
-                    path: {{ '"{{' }} tripleo_role_name ~ '/' ~ inventory_hostname ~ '/NetworkConfig' {{ '}}"' }}
+                    path: {{ '"{{' }} lookup('first_found', NetworkConfig_paths, errros='ignore') {{ '}}"' }}
                   become: no
                   register: NetworkConfig_stat
+                  vars:
+                      NetworkConfig_paths:
+                        - {{ '"{{' }} tripleo_role_name ~ '/' ~ inventory_hostname ~ '/NetworkConfig' {{ '}}"' }}
+                        - {{ '"{{' }} tripleo_role_name ~ '/NetworkConfig' {{ '}}"' }}
 
                 - name: NetworkConfig
                   block:
@@ -575,10 +579,10 @@ outputs:
                         selevel: s0
                         recurse: true
 
-                    - name: Copy NetworkConfig script
-                      copy:
+                    - name: Render NetworkConfig script
+                      template:
                         dest: /var/lib/tripleo-config/scripts/run_os_net_config.sh
-                        src: {{ '"{{' }} tripleo_role_name ~ '/' ~ inventory_hostname ~ '/NetworkConfig' {{ '}}"' }}
+                        src: {{ '"{{' }} NetworkConfig_stat.stat.path {{ '}}"' }}
                         mode: 0755
 
                     - name: Run NetworkConfig script