Moto has a vendored version of HTTPretty which also monkey patches the
socket object. If you activate both, you get weird errors like
https://github.com/spulec/moto/issues/750
So we're opting not to activate both in this test. We're are just using
the moto vendored version of httpretty for both our usage and the
mocking of boto.
I also removed the logic that seemed like it was just testing that our
mock is a mocking s3 correctly.
dead415d2b