os_config: Use ansible_facts

Author: markgoddard

roles/os_config/defaults/main.yml

@@ -1,7 +1,7 @@
 ---
-os_config_destination: /home/{{ ansible_user }}/.config/openstack
-os_config_owner: "{{ ansible_user }}"
-os_config_group: "{{ ansible_user }}"
+os_config_destination: /home/{{ ansible_facts.user }}/.config/openstack
+os_config_owner: "{{ ansible_facts.user }}"
+os_config_group: "{{ ansible_facts.user }}"
 os_config_content: |
   ---
   clouds: