[examples] fix PrismaticJointR construction in PrismaticTest
[examples] fix PrismaticJointR construction in PrismaticTest

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