User Data content should be base64 encoded when passed to aws sdk

[litjoco]

When using 0.9.0 and supplying a file to user_data the create action throws an error:

------Exception-------
Class: Kitchen::ActionFailed
Message: Failed to complete #create action: [Invalid BASE64 encoding of user data]
---Nested Exception---
Class: Aws::EC2::Errors::InvalidParameterValue
Message: Invalid BASE64 encoding of user data

If the user data file used has base64 encoded content then the create action is successful

The content of the user data file should be base64 encoded when being provided to aws sdk

[tyler-ball]

Thanks for this bug report. You are correct, AWS expects the content to be base64 encoded. Working on a fix now that will go out in a patch release.