title: Centos7 docker-py doesn't seem to be installed
body: <p>I installed Centos7 minimal and then: ansible, docker, pip and using pip I installed docker-py. </p>
  
  <p>Versions: <br>
  - Docker version 1.6.0, build 8aae715/1.6.0 <br>
  - ansible 1.9.1 <br>
  - docker_py-1.2.2 </p>
  
  <p>Trying to run a playbook, for example</p>
  
  <pre>
  - name: redis container
    docker:
      name: myredis
      image: redis
      state: started
  </pre>
  
  <p>i get msg: <code>docker-py</code> doesn't seem to be installed, but is required for the Ansible Docker module.</p>
  
  <p>I can't see the problem. Is it the CentOS, docker and ansible version?</p>
  
  <p>PS: I disabled the firewalld and SELinux</p>
  
  <p>Any ideas?
  Thanks</p>