OptaShiftEmployeeRosteringBenchmarkApp doesn't work

Open optashift-employee-rostering-benchmark module and run its main class org.optaplanner.openshift.employeerostering.benchmark.OptaShiftEmployeeRosteringBenchmarkApp. Seems like the benchmarker app hasn't been run for a long time and since it has no tests, nobody noticed it stopped working. Do we want to fix it or remove it?

I made an attempt to fix but I couldn't make RosterGenerator work even after fixing persistence.xml and adding Injectable constructors to service impls.