Miscellaneous fixes patch set

Hey John!

This patch series fixes four small bugs.

1.) The first fixes an erroneous relationship name in Schema::Result::Person that causes lots of warnings to spew forth during testing.

2.) The second silences Postgres's unhelpful notices about cascading deletes during testing.

3.) The third is simple bugfix for a method being called without $self.  I didn't encounter this as a bug, just noticed it while reading the source.

4.) The last is a fix for RT 75247, a documentation / code mismatch.

I put them all in one branch, because they're all pretty small.  If you'd like them as individual branches/issues, I'd be happy to do that.  Thank you and have a great day!

Cheers,
Fitz