Merge "Python 3: Use distro_python_version for dev mode"

ansible/roles/aodh/defaults/main.yml

ansible/roles/barbican/defaults/main.yml

ansible/roles/blazar/defaults/main.yml

ansible/roles/ceilometer/defaults/main.yml

ansible/roles/cinder/defaults/main.yml

ansible/roles/cloudkitty/defaults/main.yml

ansible/roles/congress/defaults/main.yml

ansible/roles/designate/defaults/main.yml

ansible/roles/freezer/defaults/main.yml

ansible/roles/glance/defaults/main.yml

ansible/roles/heat/defaults/main.yml

ansible/roles/horizon/defaults/main.yml

ansible/roles/ironic/defaults/main.yml

ansible/roles/keystone/defaults/main.yml

ansible/roles/kuryr/defaults/main.yml

ansible/roles/magnum/defaults/main.yml

ansible/roles/manila/defaults/main.yml

ansible/roles/masakari/defaults/main.yml

ansible/roles/mistral/defaults/main.yml

ansible/roles/murano/defaults/main.yml