[data] Make glob pattern more precise

This allows files with similar name not to clash.

For example input and input_data.

beat/backend/python/data.py

@@ -157,7 +157,7 @@ def getAllFilenames(filename, start_index=None, end_index=None):
 
     # Retrieve all the related files
     basename, ext = os.path.splitext(filename)
-    filenames = sorted(glob.glob(basename + "*"), key=file_start)
+    filenames = sorted(glob.glob(basename + ".*"), key=file_start)
 
     # (If necessary) Only keep files containing the desired indices
     if (start_index is not None) or (end_index is not None):