Terraform apply fails first time, applies correctly on 2nd run

[tayzlor]

On a first run getting this error -

aws_instance.mesos-master.0: Creation complete
Error applying plan:

1 error(s) occurred:

* dial tcp 52.16.231.211:22: i/o timeout

Terraform does not automatically rollback in the face of errors.
Instead, your Terraform state file has been partially updated with
any resources that successfully completed. Please address the error
above and apply again to incrementally change your infrastructure.

The IP address obviously changes run to run with the instances changing.

[tayzlor]

Fixed by #60