Fix missing mutagen

python_apps/airtime_analyzer/tests/filemover_analyzer_test.py

@@ -6,6 +6,7 @@ import time
 import mock
 import pytest
 from airtime_analyzer.filemover_analyzer import FileMoverAnalyzer
+
 from .conftest import AUDIO_FILENAME
 
 

python_apps/airtime_analyzer/tests/metadata_analyzer_test.py

@@ -1,6 +1,7 @@
 import datetime
 
 import mock
+import mutagen
 import pytest
 from airtime_analyzer.metadata_analyzer import MetadataAnalyzer