Beef up object-store tests

* Add object top-to-bottom tests
* Move some fakes around
* Clean up existing object tests

Change-Id: If8406da611c11bbd2b1bf5153e45b720b0eea442
cleanup files that are created for swift functional tests

Currently this portion of code is also being run when running
tox to debug local tests. Which is very annoying since a developer
will end up with a bunch of uuid files. Rather than creating it
once per run, we can have a setup/teardown that is handled safely.

Change-Id: I49a0bb3d14f24c54da93458d1e3b9093a1120453
Merge "cleanup files that are created for swift functional tests"
Merge "Beef up object-store tests"