Only include amiramesh in linear-elasticity for dune-common <= 2.7

All versions including and after dune-common-2.8 do not support amiramesh anymore

dune/elasticity/assemblers/localadolcstiffness.hh

@@ -33,7 +33,9 @@ public:
     LocalADOLCStiffness(std::shared_ptr<Dune::Elasticity::LocalEnergy<LocalView, adouble>> energy, bool useHessian2 = true)
     : localEnergy_(energy)
     , useHessian2_(useHessian2)
-    {}
+    {
+        std::cout << "Using ADOL-C for differentiation." << std::endl;
+    }
 
     virtual ~LocalADOLCStiffness() {}