message: Don't use zmq related classes if zeromq not there
diff: #pragma link off all classes;
  #pragma link off all functions;
  -#pragma link C++ class AliZMQhelpers::BaseDataTopic+;
  -#pragma link C++ class AliZMQhelpers::DataTopic+;
  -
  #ifdef ZMQ
  #pragma link C++ class AliZMQhelpers::BaseDataTopic+;
  #pragma link C++ class AliZMQhelpers::DataTopic+;
  