Instructions for pcluster setup missing pre-reqs

[jimburtoft]

If you are are following the instructions at
https://github.com/aws-neuron/aws-neuron-parallelcluster-samples#train-a-model-on-aws-trn1-parallelcluster

Nothing mentions that you need to install awscli.

You get an error:

{
  "message": "Unable to locate credentials"
}

However, the instructions at https://github.com/aws/aws-parallelcluster specifically say that you need to run

$ pip3 install awscli
and
aws configure

Maybe you want to add the instructions to https://docs.aws.amazon.com/parallelcluster/latest/ug/install-v3-virtual-environment.html or to the link above in this repository.