[Kernel] add assertion that check the symmetry of delassus operator
[Kernel] add assertion that check the symmetry of delassus operator

bremond/siconos,radarsat1/siconos,bremond/siconos,radarsat1/siconos,siconos/siconos,bremond/siconos,bremond/siconos,fperignon/siconos,fperignon/siconos,radarsat1/siconos,radarsat1/siconos,fperignon/siconos,bremond/siconos,siconos/siconos,fperignon/siconos,fperignon/siconos,siconos/siconos,siconos/siconos,radarsat1/siconos