[numerics] add an unstable test that pass only with mumps
[numerics] add an unstable test that pass only with mumps

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