switch back to master branch for docker_engine role

molecule/centos7/converge.yml

@@ -5,12 +5,15 @@
     dockerengine_packages_extra:
       - epel-release
       - python-pip
+      - python-virtualenv
 
   roles:
     - role: xoxys.docker_engine
 
 - name: Converge (Stage 2)
   hosts: all
+  environment:
+    PYTHONPATH: /opt/python2/ansible-deps/lib/python2.7/site-packages
   vars:
     postgres_repository_enabled: True
     postgres_connection_addresses:

molecule/centos7/requirements.yml

@@ -2,7 +2,7 @@
 - src: https://gitea.rknet.org/ansible/xoxys.docker_engine.git
   name: xoxys.docker_engine
   scm: git
-  version: refactoring
+  version: master
 
 - src: https://gitea.rknet.org/ansible/xoxys.postgres.git
   name: xoxys.postgres