Add support for docker-py module

defaults/main.yml

@@ -1,3 +1,4 @@
 ---
-docker_clusterstore: no
 consul_ip: 127.0.0.1
+docker_clusterstore: no
+dockerpy: no

tasks/main.yml

@@ -4,6 +4,10 @@
 - name: ensure config folder is present
   file: path=/etc/docker state=directory
 
+- name: ensure docker-py module is installed
+  pip: name=docker-py version=1.9.0
+  when: dockerpy
+
 - name: ensure daemon config file is present
   template: src=daemon.j2.json dest=/etc/docker/daemon.json
   notify: