Use S3 backend for Terraform state

[bleggett]

https://www.terraform.io/docs/backends/types/s3.html

We should look into storing the installer's Terraform state in an S3 bucket rather than in the on-disk terraform.tfstate file. This will make it harder for people to accidentally delete their state file and have to manually remove a Jazz install bit by bit.

[suryajak]

Nice. We do this as part of our daily installer but as a post install step outside of terraform though. Knowing that this available natively within terraform will ease our customers post install actions
(upgrade/destroy) as well as simplify our daily installer.