[BUG] Cloud-init exits without error message when port is already in use

[davidallendj]

Describe the bug
When running cloud-init with a port already in use, it will exit without any error message or indication of failure. This happened when trying to run both the quickstart deployment recipe and a separate cloud-init instance simultaneously.

To Reproduce
Steps to reproduce the behavior:

1. Run deployment-recipes as specified in quickstart README
2. Run cloud-init

Expected behavior
An error message stating that the port is already in use or some other failure occur.