network: Playbook to configure networking

The `network.yml` playbook is used to configure the network interfaces
on a managed node. Currently, it only supports the Red Hat configuration
style (i.e. `/etc/sysconfig/network-scripts/ifcfg-*` files).

roles/rhel-network/tasks/main.yml

@@ -0,0 +1,13 @@
+- name: ensure network devices are configured
+  template:
+    src=ifcfg.j2
+    dest=/etc/sysconfig/network-scripts/ifcfg-{{ item.ifname }}
+    mode=0644
+  with_items: '{{ network.interfaces }}'
+  notify: restart network
+
+- name: ensure ignored devices are not configured
+  file:
+    path=/etc/sysconfig/network-scripts/ifcfg-{{ item }}
+    state=absent
+  with_items: '{{ network.ignore_interfaces|d(()) }}'