LOG.debug("setUp");
  protected void setUp () {    Db.refreshDb();    s       = SessionHelper.getRootSession();    root    = StemHelper.findRootStem(s);    edu     = StemHelper.addChildStem(root, "edu", "education");    i2      = StemHelper.addChildGroup(edu, "i2", "internet2");    groups  = new HashSet();    subjs   = new HashSet();  }