In the past, we were automatically running [large parts of] the nplab
M3UA and SUA test suites, but those implement only a fraction of the
functionality. Particularly, they don't cover the non-standard IPA
behavior, and they don't cover RKM (routing key management).
Let's introduce an initial set of STP tests with this patch. We try
to not duplicate nplab here, and implement bits not covered there.
Change-Id: I628a87385cac0dfe708a0d74a5088fbd5a4790cd
