vdsm: verifyingTransport testing

Changing unused command line test to unit test. SecureXMLRPCServer is
not used by vdsm code base and it was moved to verifyingTransportTests
to be used to make sure that Verifing* classes work.

Change-Id: I1a706d4d90fdf446b06530288d947d96934e45f2
Signed-off-by: pkliczewski <piotr.kliczewski@gmail.com>
Reviewed-on: http://gerrit.ovirt.org/28858
Reviewed-by: Nir Soffer <nsoffer@redhat.com>
Reviewed-by: Dan Kenigsberg <danken@redhat.com>