Problematic:
- It didn't have its counters initialized, so vpp crashed
during a "show map stat"
- Not all the tests for "are there any domains" actually
accounted for the fake entry at pool slot 0.
- Dump details happily returned its bogus entry.
Change-Id: I57aaa9f63917686334fd4a9fa7bc80044bf1718c
Signed-off-by: Jon Loeliger <jdl@netgate.com>