Rename AWS_ROLE ENV variable

[hanchang]

The AWS_ROLE variable in the .env file is somewhat misleading, since it actually represents the Role ARN. As a result, it may be a good idea to rename it to AWS_ROLE_ARN for clarity so others in the future don't get an error message:

{ [ValidationException: 1 validation error detected: Value 'worker' at 'role' failed to satisfy constraint: Member must satisfy regular expression pattern: arn:aws:iam::\d{12}:role/?[a-zA-Z_0-9+=,.@\-_/]+]
  message: '1 validation error detected: Value \'worker\' at \'role\' failed to satisfy constraint: Member must satisfy regular expression pattern: arn:aws:iam::\\d{12}:role/?[a-zA-Z_0-9+=,.@\\-_/]+',
  code: 'ValidationException',
  time: Sun Feb 15 2015 21:18:18 GMT-0500 (EST),
  statusCode: 400,
  retryable: false,
  retryDelay: 30 }

That said, the error message was excellent, very descriptive!

[motdotla]

If we get some 👍 s on this, then we'll consider that.

[jamesyoung]

👍

[elbuo8]

👍

[motdotla]

This is updated in 0.3.15 and up on npm. Allows for either AWS_ROLE_ARN or AWS_ROLE.

FYI: that error comes directly from Amazon and passed back to the library - so that error message will always say 'role' until/if they update their error message.