springboot Improve error message when creating an image with no Docker Daemon available

when creating an image with no Docker Daemon available. Translating IOException to DockerException for a more meaningful error message.

formatting according to project formatting standards

removing local change

Comment From: scottfrederick

Merged via ce03f501c432869f796fd03d9224e28b6d56ac94 after squashing commits, editing the commit message in keeping with convention, and adding a few polishing changes. Including the entire stack trace in the translated exception made the output too verbose, so I reduced it to just the original exception message.

Thanks @mikesmithson, and congratulations on your first contribution!

Comment From: wilkinsona

This should go in a milestone so that @mikesmithson is credited in the release notes.