0022100: EDF 2413 SMESH: Take into account TRIA7

0022100: EDF 2413 SMESH: Take into account TRIA7

+  virtual SMDS_MeshFace* AddFace(const SMDS_MeshNode * n1,
+                                 const SMDS_MeshNode * n2,
+                                 const SMDS_MeshNode * n3,
+                                 const SMDS_MeshNode * n12,
+                                 const SMDS_MeshNode * n23,
+                                 const SMDS_MeshNode * n31,
+                                 const SMDS_MeshNode * nCenter);

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