tasks/initscripts: Create /etc/sysconfig/network

The initscripts network service requires /etc/sysconfig/network to be
present. The file might be missing in container images, for example
currently in CentOS 7. It seems to be created by anaconda usually.
Therefore just create it if necessary as it can be empty.

References:
https://bugs.centos.org/view.php?id=16010

tasks/main.yml

@@ -38,6 +38,12 @@
   when:
     -  network_provider == "initscripts"
 
+- name: Ensure initscripts network file dependency is present
+  copy:
+    dest: /etc/sysconfig/network
+    content: "# Created by network system role"
+    force: false
+
 - name: Configure networking connection profiles
   network_connections:
       provider:            "{{ network_provider           | mandatory }}"