function _getTestCleanupCallback(app, cb) {
    return function afterLoadingSails (err) {
      if(err) {
        return cb(new Error('Failed with error: '+err.stack));
      }
      app.lower(function (errLowering){
        if (errLowering) {
          return cb(new Error('Everything was otherwise ok, but failed to `.lower()` app. Details:' + errLowering.stack));
        }
        if (err) { return cb(err); }
        return cb();
      });
    };
  }
@param  {Function} cb [description]
@return {Function}