Fix molecule test failing due to Ansible not being installed

[geerlingguy]

When I run ansible-lint via Molecule in the molecule example in CI, it fails because Ansible is not installed. The latest versions of ansible-lint no longer strictly depend on Ansible, so it is not installed by default. Need to explicitly install it.

Molecule default > lint
  COMMAND: set -e
  yamllint .
  ansible-lint
  
  Unable to find a working copy of ansible executable. CompletedProcess(args=['ansible', '--version'], returncode=1, stdout='', stderr='Traceback (most recent call last):\n  File "/usr/bin/ansible", line 34, in <module>\n    from ansible import context\nModuleNotFoundError: No module named \'ansible\'\n')
  CRITICAL Lint failed with error code 4
WARNING  An error occurred during the test sequence action: 'lint'. Cleaning up.

[geerlingguy]

That was fixed; the other error is due to a firewalld redirection bug in the current version of Ansible. Should be fixed in the next release.