Fix Retiarii version issues on full test (#4371)

dependencies/recommended_gpu.txt

@@ -5,7 +5,7 @@ tensorflow
 keras == 2.4.3
 torch == 1.10.0+cu111
 torchvision == 0.11.1+cu111
-pytorch-lightning >= 1.4.2
+pytorch-lightning >= 1.5.0
 onnx
 peewee
 graphviz

examples/nas/oneshot/enas/macro.py

@@ -32,7 +32,7 @@ class ENASLayer(mutables.MutableScope):
         if self.skipconnect is not None:
             connection = self.skipconnect(prev_layers[:-1])
             if connection is not None:
-                out += connection
+                out = out + connection
         return self.batch_norm(out)