[Core] BaseMapping: link mapConstraints to the "meta-alias" isMechani…

…cal (#4360)

add mapConstraints to the meta-alias isMechanical

Sofa/framework/Core/src/sofa/core/BaseMapping.cpp

@@ -36,6 +36,7 @@ BaseMapping::BaseMapping()
     , f_mapMatrices(initData(&f_mapMatrices, false, "mapMatrices", "Are matrix explicit mapped?"))
 {
     this->addAlias(&f_mapForces, "isMechanical");
+    this->addAlias(&f_mapConstraints, "isMechanical");
     this->addAlias(&f_mapMasses, "isMechanical");
 }