removing unused files

These files are no long in use by swiftonfile.
- functional_auth/tempauth files are no longer required because
tests now rely on a saio setup where tempauth is already used
by default.
- tools/functional_tests.sh has been replaced by .functests.
- tools/tox_run.sh is no longer required, but swiftonfile now requires
a saio setup and swiftonfile to be configured as a storage policy
for testing.
- test/unit/common/data/* files are also no longer in use.

Signed-off-by: Thiago da Silva <thiago@redhat.com>