Use a very small problem for now

src/one-body-sample.cc

@@ -49,8 +49,8 @@ int main() {
     // FIXME: Random values
     double const E = 1e8;
     double const nu = 0.3;
-    int const refinements = 5;
-    size_t const solver_maxIterations = 10000;
+    int const refinements = 1;
+    size_t const solver_maxIterations = 10;
     double const solver_tolerance = 1e-4;
 
     typedef Dune::YaspGrid<dim> GridType;