Set the random seed for reproducibility of the output

We also fix the code to use the scripted_cell just created.

Fixes pytorch#1449

Signed-off-by: BJ Hargrave <hargrave@us.ibm.com>

beginner_source/Intro_to_TorchScript_tutorial.py

@@ -33,6 +33,7 @@
 
 import torch  # This is all you need to use both PyTorch and TorchScript!
 print(torch.__version__)
+torch.manual_seed(191009)  # set the seed for reproducibility
 
 
 ######################################################################
@@ -308,7 +309,7 @@ def forward(self, x, h):
 
 # New inputs
 x, h = torch.rand(3, 4), torch.rand(3, 4)
-traced_cell(x, h)
+print(scripted_cell(x, h))
 
 
 ######################################################################