0022100: EDF 2413 SMESH: Take into account TRIA7

0022100: EDF 2413 SMESH: Take into account TRIA7

-  void SetNodeInVolume(SMDS_MeshNode * aNode, const TopoDS_Shell & S);
+  void SetNodeInVolume(const SMDS_MeshNode * aNode, const TopoDS_Shell & S);

-  void MoveNode(const SMDS_MeshNode *, double x, double y, double z);
+  virtual void MoveNode(const SMDS_MeshNode *, double x, double y, double z);

+  // biquadratic triangle of 7 nodes
+  virtual SMDS_MeshFace* AddFaceWithID(int n1, int n2, int n3,
+                                       int n12,int n23,int n31, int nCenter, int ID);