CDK-643: Initial draft of how to use maven with Kite

* Mostly this just documents the warning about how configuration files
  can be pulled into the build.
It won't break the examples, but it will mean you can't run them on a non-QuickStart cluster without making some changes. But this isn't new, it's been that way for awhile.

Picking up the environment variables in the maven plugin isn't enough. What this was doing was making is that instead of using the configuration in src/main/resources, it would pick it up from the environment.

Either way, I'll file a blocker and take it out of this update. That will make this documentation not a blocker for 0.17 and I can remove the warning.