cleanup: Migrate existing unit tests to pytest

Cleanup the existing unit tests and move them to pytest. By using pytest
it becomes easier to add new tests for existing functionality in the
collection.

Signed-off-by: Felix Matouschek <fmatouschek@redhat.com>

tests/unit/utils/ansible_module_mock.py

@@ -2,7 +2,8 @@
 # Copyright: (c) 2021, Ansible Project
 # GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
 
-# This module maock the AnsibleModule class for more information please visite
+# This file allows to run modules in unit tests.
+# It was taken from:
 # https://docs.ansible.com/ansible/latest/dev_guide/testing_units_modules.html#module-argument-processing
 
 from __future__ import absolute_import, division, print_function
@@ -23,13 +24,11 @@ def set_module_args(args):
 
 class AnsibleExitJson(Exception):
     """Exception class to be raised by module.exit_json and caught by the test case"""
-
     pass
 
 
 class AnsibleFailJson(Exception):
     """Exception class to be raised by module.fail_json and caught by the test case"""
-
     pass
 
 
@@ -44,8 +43,3 @@ def fail_json(*args, **kwargs):
     """function to patch over fail_json; package return data into an exception"""
     kwargs["failed"] = True
     raise AnsibleFailJson(kwargs)
-
-
-def get_api_client(*args, **kwargs):
-    """function to patch over get_api_client"""
-    pass