Remove testtools.main() call from tests

There is no testtools.main() at all (this was a
unittest.main() before). Let's remove this unused
and non-working code.

The following code can be used if someone needs
to start tests manually:

    python -m unittest <test_file.py>

Change-Id: Id5162ac73825584df6c23dbe68786ff3355fc6ae
Fix wrong assertions in unit tests

A couple of assertTrue in the test_swiftclient.py
unit tests should be assertEqual. Also, the expected
values now need to be bytes literals.

Change-Id: I7cc1bd60d9ba82d1a28fbae2e1243d3c799451bd
Merge "Remove testtools.main() call from tests"