logParser rejects logs with nEventsPerJob > 10k

Following the successful test in ATLMCPROD-8659, we should allow cases where nEventsPerJob is a multiple of 10k.

Currently it fails saying

- CountHepMC Events passing all checks and written =  20000 <-- ERROR: Not an acceptable number of events for production (1, 2, 5, 10, 20, 50, 100, 200, 500, 1000, 2000, 5000, 10000)