add check and remove for docker-py

tasks/docker.yml

@@ -5,6 +5,19 @@
     state: present
   register: result
   until: result is succeeded
+  
+- name: 'Check if docker-py is installed'
+  shell: pip3 show docker-py
+  ignore_errors: true
+  register: docker_py_check
+
+- name: 'Remove docker-py if installed'
+  pip:
+    name: docker-py
+    state: absent
+  when: docker_py_check.stdout.find('docker-py') != -1
+  register: result
+  until: result is succeeded
 
 - name: 'Install docker python module'
   pip: