niwaki v0.14.16

Added

• tests/integration/README.md — explains what the live walkthroughs are
  for (evaluating the SDK against a lab APIC / simulator) and states plainly that
  they are not production configuration and not best-practice snippets:
  their values are illustrative and their job is to confirm the code runs against
  a real controller.

Fixed

• The generated coverage-matrix intro no longer hardcodes the number of design
  domains — it read "the four design domains" after further roots (aaa,
  vmm_provider) were added.