Containerize FMBench and provide instructions for running the container on EC2

[madhurprash]

Containerize FMBT and provide instructions for running the container on EC2 - Once all of the files are integrated via S3 and all the code is abstracted out in terms of generating metrics for any deployable model on SageMaker (including bring your own model/scripts), we want to be able to containerize this and run the container on EC2.

Goal: To choose the specific config file and prompt to run the container on it, generating results without any heavy lifting of any development efforts.