adding test for cooperating solvers on constraint construction
adding test for cooperating solvers on constraint construction

fniephaus/babelsberg-js,babelsberg/babelsberg-js,babelsberg/babelsberg-js,fniephaus/babelsberg-js,psieg/babelsberg-js,fniephaus/babelsberg-js,psieg/babelsberg-js,psieg/babelsberg-js,babelsberg/babelsberg-js,babelsberg/babelsberg-js,fniephaus/babelsberg-js,psieg/babelsberg-js