Move ansible log into directory

file: state=touch returns changed every time. Instead, put the log files
into a /var/log/ansible directory.

Change-Id: I086d803f0e532b9da41cb01d4e7d2ed66245dfc1

playbooks/roles/install-ansible/tasks/main.yaml

@@ -24,13 +24,13 @@
     group: admin
     mode: 0770
 
-- name: Ensure ansible log file is writable
+- name: Ensure ansible log dir is writable
   file:
-    path: /var/log/ansible.log
-    state: touch
+    path: /var/log/ansible
+    state: directory
     owner: root
     group: admin
-    mode: 0660
+    mode: 0775
 
 - name: Copy ansible.cfg in to place
   copy: