kubetest2-eks requirements

@rail mostly questions for you about what we need configuration wise

```bash
AWS_K8S_TESTER_EKS_REGION=us-west-2 \
AWS_K8S_TESTER_EKS_LOG_COLOR=false \
AWS_K8S_TESTER_EKS_S3_BUCKET_CREATE_KEEP=false
```

- Do we need a flag that allows us to set the region?
- I am going to turn off the console log color.
- We also need a flag to allow the s3 bucket to delete. It contains the log files which are nice for debugging and the yaml file which is needed in order to delete an orphaned cluster. Thoughts if we leave the s3 buckets around and then clean them up by hand for a while?
- Do we want to reuse a role that is created, or do you want the AWS user running the tests to have permissions to create the role?