TestOpenStackBase.setup: Remove arguments
TestOpenStackBase.setup: Remove arguments

In newer py.test versions, the test method itself was being passed as
the conf arg, causing errors. We don't even use it, so remove it.

Signed-off-by: Zack Cerza <d7cdf09fc0f0426e98c9978ee42da5d61fa54986@redhat.com>

ceph/teuthology,ceph/teuthology,ktdreyer/teuthology,ktdreyer/teuthology