Added a BYO playbook for configuring NetworkManager on nodes

In order to do a full install of OpenShfit using the byo/config.yml
playbook, it is currently required that NetworkManager be installed
and configured on the nodes prior to the installation. This playbook
introduces a very simple default configuration that can be used to
install, configure and enable NetworkManager on their nodes.

Signed-off-by: Steve Kuznetsov <skuznets@redhat.com>

playbooks/byo/openshift-node/network_manager.yml

@@ -0,0 +1,36 @@
+---
+- hosts: localhost
+  connection: local
+  become: no
+  gather_facts: no
+  tasks:
+  - include_vars: ../../byo/openshift-cluster/cluster_hosts.yml
+  - add_host:
+      name: "{{ item }}"
+      groups: l_oo_all_hosts
+    with_items: "{{ g_all_hosts }}"
+
+- hosts: l_oo_all_hosts
+  become: yes
+  tasks:
+    - name: install NetworkManager
+      package:
+        name: 'NetworkManager'
+        state: present
+
+    - name: configure NetworkManager
+      lineinfile:
+        dest: "/etc/sysconfig/network-scripts/ifcfg-{{ ansible_default_ipv4['interface'] }}"
+        regexp: '^{{ item }}='
+        line: '{{ item }}=yes'
+        state: present
+        create: yes
+      with_items:
+        - 'USE_PEERDNS'
+        - 'NM_CONTROLLED'
+
+    - name: enable and start NetworkManager
+      service:
+        name: 'NetworkManager'
+        state: started
+        enabled: yes