PCR for AWS Scritp Updte (rubrikinc#128)

* Added PCR for AWS script

* Fixed linting errors

* formatting fix

* Added support for AWS Profiles

* Removed Rubrik Python module from required modules.

* Fixed improper bundle tagging.

* Added steps to install Docker.

* Added updated bundle version number output.

* Removed option to set AWS profile. Get profile from environment.

* Added option to set PCR in RSC

* Added option to use non-ECR PCR

* Documentation Update

* Support updating PCR config on every run.

* Support multiple versions of EKS.

* Download only if bundle version has changed.

* Clarify authentication requirements

* Add additional logging and debugging.

* Support repos with / in the name.

* Fixed handling of bundle approval.

sample/pcr-aws/README.MD

@@ -12,4 +12,5 @@ This script downloads the images that are used for Rubrik Security Cloud Exocomp
 1. [Install the Docker engine](https://docs.docker.com/engine/install/).
 1. Run `docker run hello-world` to verify that the Docker engine is working properly.
 1. Make sure that you have enough space on your local system to download the images. Images will be downloaded to the default local Docker registry.
-1. Run `python3 ./pcr.py --keyfile <path to keyfile> --pcrFqdn <FQDN_of_the_private_container_registry> --profile <Name_of_the_AWS_profile_with_the_private_container_registry>`
+1. If required create a [service account](https://docs.rubrik.com/en-us/saas/saas/service_account.html) in RSC and save the credential file (key file).
+1. Run `python3 ./pcr.py --keyfile <path to keyfile> --pcrFqdn <FQDN_of_the_private_container_registry> --profile <Name_of_the_AWS_profile_with_the_private_container_registry> -a <aws_account> --eksVersion <version_of_eks_in_use> `