perltap tests: Fix paths to naemon

This makes most of them run.

Signed-off-by: Robin Sonefors <robin.sonefors@op5.com>
t/nagiostats: Make test not rely on deleted tests

The supposedly generated status config was generated by
660status-downtimes-comments, which supposedly tested the CGI, but did
in fact also generate files for this test. That test is gone, because
the CGIs are gone, so do the minimum amount of adjustments necessary to
make these tests green again.

Signed-off-by: Robin Sonefors <robin.sonefors@op5.com>