New port: sysutils/py-ansible-runner: programmable interface to ansible

Ansible Runner provides both a command-line tool, and a python library
to import and embed in custom applications. It is intended to provide a
stable and consistent abstraction to Ansible, along with an extensible
plugin interface.

WWW: https://ansible-runner.readthedocs.io/

Approved by: jrm (mentor)
Differential Revision: https://reviews.freebsd.org/D17518