And ran into a different problem with centos6. Sigh.

test/integration/roles/test_docker/tasks/main.yml

 - include: docker-setup-rht.yml
   when: ansible_distribution in ['Fedora']
-- include: docker-setup-rht.yml
+#- include: docker-setup-rht.yml
   # Packages on RHEL and CentOS 7 are broken, broken, broken.  Revisit when
   # they've got that sorted out
-  when: ansible_distribution in ['RedHat', 'CentOS'] and ansible_lsb.major_release|int == 6
+  # CentOS 6 currently broken by conflicting files in pyhton-backports and python-backports-ssl_match_hostname
+  #when: ansible_distribution in ['RedHat', 'CentOS'] and ansible_lsb.major_release|int == 6
 
 # python-docker isn't available until 14.10.  Revist at the next Ubuntu LTS
 #- include: docker-setup-debian.yml