v3 API samples for servers

Adds the rest of API samples for the core servers plugin. This is separate
from the other servers api samples because the output is potentially
dependent on all the other extensions and I'm expecting lots of merge
issues.

Partially implements blueprint v3-api-specification
Partially implements blueprint v3-api-unittests

Change-Id: Iffc814f327b0047c3510bfe5b8bbcb9e0e4540db
Merge "v3 API samples for servers"