reference tests as examples

Remove samples and reference the tests as examples instead.

We don't need these samples for two reasons:
1. It is already duplicated in either JJB tests or documentation.
2. We don't test these samples so they may become outdated (some already have).

Change-Id: If1ba6cc8a675091e740fa254951bb8fcbcee6903
Merge "reference tests as examples"