Implement *Tolerance() methods from LinearSolverInterface

See cset f08b1fb48d19 for additional details.

opm/core/linalg/LinearSolverAGMG.cpp

@@ -121,4 +121,16 @@ namespace Opm
         rpt.converged = rpt.iterations <= max_it_;
         return rpt;
     }
+
+    void
+    LinearSolverAGMG::setTolerance(const double tol)
+    {
+        rtol_ = tol;
+    }
+
+    double
+    LinearSolverAGMG::getTolerance() const
+    {
+        return rtol_;
+    }
 } // namespace Opm

opm/core/linalg/LinearSolverAGMG.hpp

@@ -82,6 +82,14 @@ namespace Opm
               const int* ia, const int* ja, const double* sa,
               const double* rhs, double* solution) const;
 
+        /// Set tolerance for the linear solver.
+        /// \param[in] tol         tolerance value
+        virtual void setTolerance(const double tol);
+
+        /// Get tolerance for the linear solver.
+        /// \return tolerance value
+        virtual double getTolerance() const;
+
     private:
         int    max_it_;
         double rtol_  ;