Use CUDA stab instead of specifing LD_LIBRARY_PATH (blue-oil#425)

docker/Dockerfile

@@ -123,10 +123,11 @@ ENV HOROVOD_GPU_ALLREDUCE NCCL
 ENV HOROVOD_WITH_TENSORFLOW 1
 
 ENV CUDA_HOME /usr/local/cuda-10.0
-ENV LD_LIBRARY_PATH /usr/local/cuda-10.0/compat/:/usr/local/cuda-10.0/targets/x86_64-linux/lib/:$LD_LIBRARY_PATH
 
-# Install requirements for distributed training
-RUN pip install -r /tmp/requirements/dist.requirements.txt
+# Install requirements for distributed training temporarily using CUDA stubs
+RUN ldconfig /usr/local/cuda-10.0/targets/x86_64-linux/lib/stubs && \
+    pip install -r /tmp/requirements/dist.requirements.txt && \
+    ldconfig
 
 # Configure OpenMPI to run good defaults:
 #   --bind-to none --map-by slot --mca btl_tcp_if_exclude lo,docker0 --mca btl_vader_single_copy_mechanism none