fixed tests, added config files

.isort.cfg

+[settings]
+line_length=120
+default_section = THIRDPARTY
+known_first_party=analysis,compare,helperFunctions,install,intercom,objects,plugins,
+    scheduler,statistic,storage,test,unpacker,version,web_interface
+multi_line_output=6

common_helper_mongo/__init__.py

-from .aggregate import (get_field_average, get_field_execute_operation,
-                        get_field_sum, get_list_of_all_values,
-                        get_objects_and_count_of_occurrence)
+from .aggregate import (
+    get_field_average, get_field_execute_operation, get_field_sum, get_list_of_all_values,
+    get_objects_and_count_of_occurrence
+)
 from .gridfs import overwrite_file
 
 __all__ = [

pytest.ini

 [pytest]
-addopts = --pep8 -v
-pep8ignore = 
-    *.py E501
+addopts = --flake8 -v
+flake8-ignore =
+    *.py E501 W503
+    install.py E402
+    src/plugins/* E402
+    */bin/* ALL
+flake8-select =
+    *.py W504

tests/test_aggregate.py

 from common_helper_mongo.aggregate import (
     get_all_value_combinations_of_fields, get_field_average, get_field_sum, get_list_of_all_values,
-    get_list_of_all_values_and_collect_information_of_additional_field, get_objects_and_count_of_occurrence,
+    get_objects_and_count_of_occurrence
 )
 from tests.base_class_database_test import MongoDbTest
 
@@ -81,9 +81,3 @@ class TestAggregate(MongoDbTest):
     def test_get_field_execute_operation_empty(self):
         result = get_field_sum(self.test_collection, "$test_int")
         self.assertEqual(result, 0)
-
-    def test_get_list_of_all_values_and_collect_information_of_additional_field(self):
-        self.add_list_test_data()
-        with self.assertLogs() as logger:
-            get_list_of_all_values_and_collect_information_of_additional_field(self.test_collection, "$test_list", "$_id", unwind=True)
-            assert 'deprecation warning' in logger.output.pop()