Add SageMaker integ test for hyperparameter tuning model_dir logic (aws#183)

Author: laurenyu

docker/1.12.0/Dockerfile.gpu

@@ -112,7 +112,10 @@ COPY $framework_support_installable .
 
 RUN pip install --no-cache-dir -U \
     keras==2.2.4 \
+<<<<<<< HEAD
     mpi4py==3.0.1 \
+=======
+>>>>>>> Add SageMaker integ test for hyperparameter tuning model_dir logic (#183)
     $framework_support_installable \
     "sagemaker-tensorflow>=1.12,<1.13" \
     # Let's install TensorFlow separately in the end to avoid