Issue #22 Allow topic auto-creation as an option

[jgaviria]

Hello Folks,

It would be really useful to allow topic-auto creation from both the publisher and consumer since sometimes it is a lot more complicated to do it from the Docker container.

Let me know if the code looks good or if you want any changes.

[britth]

This looks great, thanks for the contribution @jgaviria ! One possible suggestion: what do you think about undoing the changes to the test config, and instead adding a new test in the consumer and producer tests that temporarily overrides this setting there? That way, we can continue to test default behavior?