1.3.1rc2

This is the second release candidate for the 1.3.1 stable release of ARA.

Changes since 1.3.0:

- bugfix: the callback plugin now properly retrieves host facts for
  both setup and gather_fact tasks
- bugfix: fixed a typo in ara.setup.env which set the
  ANSIBLE_ACTION_PLUGINS to the callback directory instead of the
  action module directory.
- unit tests: use assertLogs instead of patch_logger since
  patch_logger was removed from django 3.
- misc: bumped versions of Ansible used in integration tests