Removing number of events form allen_gaudi_seed_and_match

Removing number of events from allen_gaudi_seed_and_match.py test option in order to use in in the data challenges jobs. For details: lhcb-rta/data-challenges#35

To keep current qmt tests working, a new input file default_input_and_conds_hlt1_retinacluster_FTv6_100_events with 100 events was created.