install docker and docker-compose as python dependency

tasks/install.yml

@@ -1,17 +1,15 @@
 ---
 - block:
-    - name: Install docker engine packages
+    - name: Install docker engine
       package:
-        name: "{{ item }}"
+        name: "{{ dockerengine_package }}"
         state: installed
-      loop:
-        - "{{ dockerengine_package }}"
-        - docker-compose
 
     - name: Install python dependencies
       pip:
         name:
           - docker
+          - docker-compose
 
     - name: Add docker group
       group: