22222: [CEA 820] GHS3D in salome 7.2.0 ten times slower than in salome 6.6.0

Choose a compute event (COMPUTE or COMPUTE_SUBMESH) depending on an
explicit parameter aShapeOnly.

   bool Compute(::SMESH_Mesh &        aMesh,
                const TopoDS_Shape &  aShape,
+               const bool            aShapeOnly=false,
                const bool            anUpward=false,
                const ::MeshDimension aDim=::MeshDim_3D,
                TSetOfInt*            aShapesId=0);