In Ansible Tower/AWX, there are three kinds of objects that can be tied
to custom python virtual environment:
- job template
- project
- organization
This patch updates the three ansible modules that creates those objects
so that the 'custom_virtualenv' attribute can be set if specified.
Testing Done: via a playbook, test organization, projet then template creation
without any 'custom_virtualenv' attribute specified. Check that the
resources get created and that their python env is set to default. Then
re-do the same test but this time with the 'custom_virtualenv' attribute
specified. Ensure in AWX UI that those resources have the right
'custom_virtualenv' set.