Fix new topology mpi communicator name

HySoP/hysop/operator/energy_enstrophy.py

@@ -139,7 +139,7 @@ class Energy_enstrophy(Monitoring):
         sendbuff = npw.zeros((2))
         recvbuff = npw.zeros((2))
         sendbuff[:] = [local_energy, local_enstrophy]
-        self._topo.topo.Allreduce(sendbuff, recvbuff)
+        self._topo.comm.Allreduce(sendbuff, recvbuff)
         # the other way :
         #energy = self._topovel.topo.allreduce(local_energy, PARMES_MPI_REAL,
         #                                     op=MPI.SUM)