Cleanup. Sone fixes found by code analyzer.

kosapi/dynamic_class_loader.py

kosapi/entity/fields/base_field.py

kosapi/entity_factory.py

kosapi/parser/field_visitor.py

kosapi/parser/parser.py

kosapi/resource/__init__.py

kosapi/resource/resource.py

kosapi/resource/resource_entity_getter.py

kosapi/settings.py

kosapi/utils/timetable.py

tests/entity/fields/test_integerField.py

tests/entity/test_baseEntity.py