Brianjo ddp patch (#1426)

* Rename ddp_pipeline_tutorial.py to ddp_pipeline.py

This will make this file non-executable and the code will still show up in the file.

* Update build.sh

* Update index.rst

Author: brianjo

.jenkins/build.sh

@@ -47,7 +47,7 @@ export NUM_WORKERS=20
 if [[ "${JOB_BASE_NAME}" == *worker_* ]]; then
   # Step 1: Remove runnable code from tutorials that are not supposed to be run
   python $DIR/remove_runnable_code.py beginner_source/aws_distributed_training_tutorial.py beginner_source/aws_distributed_training_tutorial.py || true
-  python $DIR/remove_runnable_code.py advanced_source/ddp_pipeline_tutorial.py advanced_source/ddp_pipeline_tutorial.py || true
+  # python $DIR/remove_runnable_code.py advanced_source/ddp_pipeline_tutorial.py advanced_source/ddp_pipeline_tutorial.py || true
   # Temp remove for mnist download issue. 
   python $DIR/remove_runnable_code.py beginner_source/fgsm_tutorial.py beginner_source/fgsm_tutorial.py || true
   python $DIR/remove_runnable_code.py intermediate_source/spatial_transformer_tutorial.py intermediate_source/spatial_transformer_tutorial.py || true

advanced_source/ddp_pipeline_tutorial.py renamed to advanced_source/ddp_pipeline.py

@@ -424,7 +424,7 @@ Welcome to PyTorch Tutorials
    :header: Training Transformer models using Distributed Data Parallel and Pipeline Parallelism
    :card_description: Walk through a through a simple example of how to train a transformer model using Distributed Data Parallel and Pipeline Parallelism
    :image: _static/img/thumbnails/cropped/Training-Transformer-Models-using-Distributed-Data-Parallel-and-Pipeline-Parallelism.png
-   :link: advanced/ddp_pipeline_tutorial.html
+   :link: advanced/ddp_pipeline.html
    :tags: Parallel-and-Distributed-Training
 
 .. Mobile
@@ -637,7 +637,7 @@ Additional Resources
    intermediate/rpc_async_execution
    advanced/rpc_ddp_tutorial
    intermediate/pipeline_tutorial
-   advanced/ddp_pipeline_tutorial
+   advanced/ddp_pipeline
 
 .. toctree::
    :maxdepth: 2