[dataset] casia: rename id to label (to be more generic)

bob/learn/pytorch/datasets/casia_webface.py

@@ -58,7 +58,7 @@ class CasiaWebFaceDataset(Dataset):
     """
     image = bob.io.base.load(self.data_files[idx])
     identity = self.id_labels[idx]
-    sample = {'image': image, 'id': identity}
+    sample = {'image': image, 'label': identity}
 
     if self.transform:
       sample = self.transform(sample)
@@ -133,7 +133,7 @@ class CasiaDataset(Dataset):
     image = bob.io.base.load(self.data_files[idx])
     identity = self.id_labels[idx]
     pose = self.pose_labels[idx]
-    sample = {'image': image, 'id': identity, 'pose': pose}
+    sample = {'image': image, 'label': identity, 'pose': pose}
 
     if self.transform:
       sample = self.transform(sample)