Support Storage Policy - Rev 3

Remove functional tests

* Functional tests can be run from Swift's source itself.
* This means we do not need to have a copy of those functional
  tests in our repo and keep it in sync with upstream Swift.

TODO:
Add doc, scripts and conf files necessary to run Swift's functional
tests against (SAIO + swiftonfile) setup.

Signed-off-by: Prashanth Pai <ppai@redhat.com>