Added Jenkins slave python role, updated docker role

Change-Id: I4b900728a318dc59c4ffc4ba4c06d981f29f1758
diff --git a/jenkins/slave/docker.yml b/jenkins/slave/docker.yml
index ea3639b..227dd51 100644
--- a/jenkins/slave/docker.yml
+++ b/jenkins/slave/docker.yml
@@ -15,4 +15,7 @@
             hosts:
             - ALL
             commands:
-            - /usr/bin/docker
\ No newline at end of file
+            - /usr/bin/docker
+      package:
+        docker-ce:
+          version: latest