Communicate best practice for extending the classpath of Dataflow/Skipper

[onobc]

Up until now, the recommended approach to extend the classpath for Dataflow or Skipper has been to pull source code, update the pom.xml, and rebuild. This is intrusive and cumbersome for users.

@corneil has come up w/ a recipe (TODO add link here) to make this easier and less intrusive.

This ticket is to clearly communicate this to our users via updates to the Dataflow and Skipper reference guides. Specifically each guide has a section that shows how to add a custom JDBC driver using the current recipe. Let's show how to add a custom driver to the classpath w/ the new recipe.

Ref guides

• Dataflow -> Adding a Custom JDBC Driver
• Skipper -> Adding a Custom JDBC Driver

Work items

• Show how to add a custom driver to the classpath w/ the new recipe.
• TO_DECIDE Keep both recipes, or just show the new one?

[onobc]

Closed via c63fc35