s/.should.have.status/.statusCode.should.equal/g

The former syntax leads to extremely large error messages (many ~100s of
lines) in case of failure because it dumps the entire response object,
which contains a huge amount of stuff.

The new one gives a much more modest error message and makes my list of
26 errors much more comprehensible.
Merge pull request #606 from scraperwiki/quieter-test-failures

s/.should.have.status/.statusCode.should.equal/g