Remove unnecessary Thorfile
Update to latest & greatest gems
Drop unused environment file
Update spec_helper for Serverspec v2
Update RuboCop as per name change in v0.23
Ensure RuboCop ignores a simple helper script
Use published version of route53 cookbook
Use ChefSpec v4.1 ServerRunner method
Convert specs to RSpec 3.1.7 syntax with Transpec

This conversion is done by Transpec 2.3.7 with the following command:
    transpec -f

* 3 conversions
    from: obj.stub(:message)
      to: allow(obj).to receive(:message)

For more details: https://github.com/yujinakayama/transpec#supported-conversions
Uninstall the RDS → S3 backup mechanisms
Drop CentOS testing
Use Supermarket Berkshelf endpoint
Bump to v2.0.0
Use pessimistic version for rds-s3-backups
Bump to v2.0.1