Additional tripleo packages for python3
Additional tripleo packages for python3

We've recently merged python3 support into the specs for the following
projects:

- paunch
- tripleo-puppet-elements
- os-collect-config
- tripleo-heat-templates
- tripleo-image-elements
- os-net-config
- os-apply-config
- os-refresh-config
- tripleo-validations

Change-Id: I7cc9e9d428176489338335120512221c7cdecb48

javierpena/rdoinfo,redhat-openstack/rdoinfo