manager: tests: utils: directory for modeling tests

diff --git a/manager/tests/unit/utils/test_modeling.py b/manager/tests/unit/utils/modeling/test_base_schema.py
similarity index 100%
rename from manager/tests/unit/utils/test_modeling.py
rename to manager/tests/unit/utils/modeling/test_base_schema.py

diff --git a/manager/tests/unit/utils/test_types.py b/manager/tests/unit/utils/modeling/test_types.py
similarity index 100%
rename from manager/tests/unit/utils/test_types.py
rename to manager/tests/unit/utils/modeling/test_types.py