default solver verbosity quiet

src/solver/solver_manager.h

@@ -49,7 +49,8 @@ public:
 
   virtual ~SolverManager() = default;
 
-  std::string solve(const ReportVerbosity report_level);
+  std::string solve(const ReportVerbosity report_level =
+                      ReportVerbosity::QUIET);
 
   virtual void computeCovariances(const CovarianceBlocksToBeComputed blocks) = 0;