New sudocmdgroup management module.

There is a new sudocmdgroup management module placed in the plugins folder:

plugins/modules/ipasudocmdgroup.py

The sudocmdgroup module allows to add or remove sudo command groups..

The sudocmdgroup module is as compatible as possible to the Ansible upstream
ipa_sudocmdgroup module, and additionally offers to ensure member presence
and absence.

Here is the documentation for the module:

  README-sudocmdgroup.md

New example playbooks have been added:

  playbooks/sudocmd/ensure-sudocmdgroup-is-absent.yml
  playbooks/sudocmd/ensure-sudocmdgroup-is-present.yml
  playbooks/sudocmd/ensure-sudocmd-is-absent-in-sudocmdgroup.yml
  playbooks/sudocmd/ensure-sudocmd-is-present-in-sudocmdgroup.yml

A test playbook is provided in:

  tests/sudocmdgroup/test_sudocmdgroup.yml

Signed-off-by: Rafael Guterres Jeffman <rjeffman@redhat.com>