fix: Fix incorrect HDF5 dataset path variable name

Author: pierluigiferrari

data_generator/object_detection_2d_data_generator.py

@@ -211,7 +211,7 @@ def __init__(self,
             self.eval_neutral = None
 
         if not hdf5_dataset_path is None:
-            self.hdf5_dataset_path = file_path
+            self.hdf5_dataset_path = hdf5_dataset_path
             self.load_hdf5_dataset(verbose=verbose)
         else:
             self.hdf5_dataset = None