0020982: EDF 1547 SMESH: Creation of non-conformal quadratic pyramids

0020982: EDF 1547 SMESH: Creation of non-conformal quadratic pyramids

   bool IsLinked (const SMDS_MeshNode* theNode1,
                  const SMDS_MeshNode* theNode2,
+                 const bool           theIgnoreMediumNodes=false) const;
   // Return true if theNode1 is linked with theNode2.
+  // If theIgnoreMediumNodes then corner nodes of quadratic cell are considered linked as well