Configure test logging at import time (rather than at setup time)

tests/abstract_test.py

@@ -4,14 +4,14 @@ import unittest
 
 from blender_asset_tracer import blendfile
 
+logging.basicConfig(
+    format='%(asctime)-15s %(levelname)8s %(name)s %(message)s',
+    level=logging.INFO)
 
 class AbstractBlendFileTest(unittest.TestCase):
     @classmethod
     def setUpClass(cls):
         cls.blendfiles = pathlib.Path(__file__).with_name('blendfiles')
-        logging.basicConfig(
-            format='%(asctime)-15s %(levelname)8s %(name)s %(message)s',
-            level=logging.INFO)
 
     def setUp(self):
         self.bf = None