rename 'assembleMatrix' to 'assembleHessianApproximation', because that is what it is

[[Imported from SVN: r5595]]

src/averagedistanceassembler.hh

@@ -45,8 +45,8 @@ public:
 #endif
     }
 
-    void assembleMatrix(const TargetSpace& x,
-                        Dune::FieldMatrix<double,size,size>& matrix) const
+    void assembleHessianApproximation(const TargetSpace& x,
+                                      Dune::FieldMatrix<double,size,size>& matrix) const
     {
         for (int i=0; i<size; i++)
             for (int j=0; j<size; j++)

src/targetspacertrsolver.cc

@@ -77,7 +77,7 @@ void TargetSpaceRiemannianTRSolver<TargetSpace>::solve()
         MatrixType hesseMatrix(1,1);
 
         assembler_->assembleGradient(x_, rhs[0]);
-        assembler_->assembleMatrix(x_, hesseMatrix[0][0]);
+        assembler_->assembleHessianApproximation(x_, hesseMatrix[0][0]);
 
         //gradientFDCheck(x_, rhs, *rodAssembler_);
         //hessianFDCheck(x_, *hessianMatrix_, *rodAssembler_);