CORD-408 update docker-py version to not use wildcard

Change-Id: I3f8fef81e758ddfd85d4665d3a72be762631f487
diff --git a/roles/compute-node/tasks/main.yml b/roles/compute-node/tasks/main.yml
index ebbb1be..0cfb973 100644
--- a/roles/compute-node/tasks/main.yml
+++ b/roles/compute-node/tasks/main.yml
@@ -48,7 +48,7 @@
   become: yes
   pip:
     name=docker-py
-    version=0.3.1
+    version=1.9
 
 - name: Set Default Password
   become: yes