This patch adds an xfstests-style functional test suite. Run "tox -e tempauth"
to test swift3 with TempAuth, and "tox -e keystone" to test with the Keystone
auth system. You don't need to prepare Swift and Keystone system for that.
They will be started with minimum configuration automatically.
If you already have a Swift cluster for the functional test, run "./check" in
the test directory directly. Individual tests can be run using "./check 003",
and various other options are also supported. Try "./check -h" for more
information.
I added some sample test cases but they are not enough at all obviously. More
tests will be added soon.
Change-Id: I75abce574768abbe88f60d8c1eee87757651e357
a7373a55f5