Link dv transport plugin to libgnunetats (for logging)

git-svn-id: https://gnunet.org/svn/gnunet@31027 140774ce-b5e7-0310-ab8b-a85725594a96
Pythonize the revocation test

git-svn-id: https://gnunet.org/svn/gnunet@31028 140774ce-b5e7-0310-ab8b-a85725594a96