[CORD-2891]
Update docker related python packages (in 4 places...)

Change-Id: Ifa1202aa5c441ad45d78fa7272e262fedc93efd9
diff --git a/ansible/roles/docker/tasks/debian.yml b/ansible/roles/docker/tasks/debian.yml
index 36a8bca..95413d0 100644
--- a/ansible/roles/docker/tasks/debian.yml
+++ b/ansible/roles/docker/tasks/debian.yml
@@ -1,4 +1,4 @@
-
+---
 # Copyright 2017-present Open Networking Foundation
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
@@ -13,9 +13,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-
----
-
 - name: Trust docker apt key
   apt_key:
     data={{ lookup('file', 'docker_apt_key.gpg') }}
@@ -40,7 +37,7 @@
 
 - name: Debian docker-py is present
   pip:
-    name: "docker==2.4.2"
+    name: "docker==3.2.1"
     state: present
   tags: [docker]