Support configuration file instead of IAM role description.

[danieljimenez]

Hi, this ticket is to request support for another method besides IAM role description for Keymaker support. The problem I have, is IAM role description isn't offered via CloudFormation.

Thanks! Daniel

[kislyuk]

Thanks for the idea. This most likely will not happen without an outside contribution, since I'm unlikely to need that feature. PRs welcome :)

Keep in mind, configuration is only needed when doing cross-account authentication or group membership checks. Also, you can edit the role description after deploying with CloudFormation.

[renaudhager]

I submitted a PR adding config file support.