do not complain when IP is matched with a host

Signed-off-by: Alfredo Deza <alfredo.deza@inktank.com>
update tests to reflect new validator behavior

Signed-off-by: Alfredo Deza <alfredo.deza@inktank.com>
Merge pull request #52 from alfredodeza/6124

don't prevent HOST:IP from being used as it is valid