Rename --solver-threads option to confirm with Cpp naming

Belonging to [master]:
  - #2813

Compiler/Template/CodegenCpp.tpl

@@ -2283,7 +2283,7 @@ case SIMCODE(modelInfo=MODELINFO(__), makefileParams=MAKEFILE_PARAMS(__), simula
       opts["-R"] = "<%simulationLibDir(simulationCodeTarget(),simCode , &extraFuncs , &extraFuncsDecl,  extraFuncsNamespace)%>";
       opts["-M"] = "<%moLib%>";
       opts["-F"] = "<%simulationResults(getRunningTestsuite(),simCode , &extraFuncs , &extraFuncsDecl,  extraFuncsNamespace)%>";
-      opts["--solverThreads"] = "<%if(intGt(getConfigInt(NUM_PROC), 0)) then getConfigInt(NUM_PROC) else 1%>";
+      opts["--solver-threads"] = "<%if(intGt(getConfigInt(NUM_PROC), 0)) then getConfigInt(NUM_PROC) else 1%>";
       <%if (stringEq(settings.outputFormat, "empty")) then 'opts["-O"] = "none";' else ""%>
       <%
       match(getConfigString(PROFILING_LEVEL))

SimulationRuntime/cpp/SimCoreFactory/OMCFactory/OMCFactory.cpp

@@ -333,7 +333,7 @@ SimSettings OMCFactory::readSimulationParameter(int argc, const char* argv[])
      descHidden.add_options()
           ("ignored", po::value<vector<string> >(), "ignored options")
           ("unrecognized", po::value<vector<string> >(), "unsupported options")
-          ("solverThreads", po::value<int>()->default_value(1), "number of threads that can be used by the solver")
+          ("solver-threads", po::value<int>()->default_value(1), "number of threads that can be used by the solver")
           ;
 
      po::options_description descAll("All options");
@@ -377,7 +377,7 @@ SimSettings OMCFactory::readSimulationParameter(int argc, const char* argv[])
      double stoptime = vm["stop-time"].as<double>();
      double stepsize =vm["step-size"].as<double>();
      bool nlsContinueOnError = vm["nls-continue"].as<bool>();
-     int solverThreads = vm["solverThreads"].as<int>();
+     int solverThreads = vm["solver-threads"].as<int>();
 
      if (!(stepsize > 0.0))
          stepsize = (stoptime - starttime) / vm["number-of-intervals"].as<int>();