Update to Ansible 2.2.1.0 and adjust all file mode settings to provide them as strings

tasks/install.yml

@@ -11,7 +11,7 @@
   apt_repository:
     repo='deb https://apt.dockerproject.org/repo ubuntu-{{ ansible_distribution_release }} main'
     state='present'
-    mode=644
+    mode='644'
 
 - name: "Install Docker Engine"
   apt: