r_byo_r_algo_hpo/tune_r_bring_your_own.ipynb issues

tested this notebook: https://github.com/awslabs/amazon-sagemaker-examples/blob/master/r_examples/r_byo_r_algo_hpo/tune_r_bring_your_own.ipynb

issues:
notebook couldn't run end to end
`error outputed: CalledProcessError `

Start by running r_examples/r_byo_r_algo_hpo/tune_r_bring_your_own.ipynb end to end and capture the full CalledProcessError output, since the issue only reports that it failed. Trace the failing notebook cell and its SageMaker job or command; done means the notebook completes successfully from start to finish.

Written by the indexing model from the issue text.