0022134: DriverGMF : reading quadratic meshes

0022134: DriverGMF : reading quadratic meshes

  Fix errors of import/export of meshes including both linear and
  quadratic elements.

+  SMDS_ElemIteratorPtr elementIterator(SMDSAbs_ElementType  type);
+  SMDS_ElemIteratorPtr elementIterator(SMDSAbs_EntityType   type);
+  SMDS_ElemIteratorPtr elementIterator(SMDSAbs_GeometryType type);