Updated the Docker Image with the Latest one that uses GPU as of PR #255

[MATRIX4284]

Updated the docker image from pytorch/pytorch:1.0-cuda10.0-cudnn7-runtime to kubeflow/pytorch:1.0-cuda10.0-cudnn7-runtime as the pytorch/pytorch:1.0-cuda10.0-cudnn7-runtime is not GPU compatible.Hence using the Docker Image of PR #255.

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Hi @MATRIX4284. Thanks for your PR.

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[coveralls]

Coverage remained the same at 22.97% when pulling 246b58e on MATRIX4284:patch-1 into 047cf0f on kubeflow:master.