Fix logger.

src/validation/validate.py

@@ -14,7 +14,7 @@ MAX_SUBMISSION_SIZE = 1024 * 1024 * 120  # 120 MB.
 MAX_SINGLE_SUBMISSION_SIZE = 1024 * 1024  # 1MB.
 MAX_SUBMISSION_LINES = DATASET_SIZE + 1  # Allow empty line.
 
-logger = get_logger()
+logger = get_logger(__name__)
 
 
 def is_valid(