Allow passing arn for iam role

[Fliko]

Where I work I do not have the permissions to create or modify roles. When messing around with components I needed to pull down this repo and modify it so that I could pass in an existing role. Would you be open to me creating a pr allowing existing roles to be used?

[Fliko]

Since there is an existing role field this could look like

inputs:
    name: my-function
    description: My Serverless Function
    memory: 128
    timeout: 20
    code: ./code
    handler: handler.hello
    runtime: nodejs8.10
    role:
      arn: XXX

[eahefnawy]

@Fliko absolutely! This is very common. Thanks for pitching in 😊

[Fliko]

@eahefnawy I've got a pr up, let me know what you think.

[etx]

Did this get sorted? Right now every function is getting a Role with Administrator rights and my security team is freaking out.

[austencollins]

Yes, this has all been added (and a lot more) to the latest version of this component as part of our Components GA launch.