test: PyTorchProcessor unit needs py_version

Fix a unit test failure in test_processing.py by providing
appropriate py_version parameter to PyTorchProcessor

Author: athewsey

tests/unit/test_processing.py

@@ -288,6 +288,7 @@ def test_normalize_args_prepares_framework_processor(
     isfile_mock,
     botocore_resolver,
     pytorch_training_latest_version,
+    pytorch_training_latest_py_version,
     sagemaker_session,
     uploaded_code,
 ):
@@ -296,6 +297,7 @@ def test_normalize_args_prepares_framework_processor(
     processor = PyTorchProcessor(
         role=ROLE,
         framework_version=pytorch_training_latest_version,
+        py_version=pytorch_training_latest_py_version,
         instance_type="ml.m4.xlarge",
         instance_count=1,
         sagemaker_session=sagemaker_session,