Fix trials factor in configuration file
Fixing line https://git.ligo.org/emfollow/gwcelery/blob/master/gwcelery/conf/init.py#L84
After discussing with Peter, this should read:
preliminary_alert_trials_factor = dict(cbc=5.0, burst=4.0)
"""Trials factor corresponding to trigger categories.
For CBC and Burst, trials factor is the number of pipelines.
CBC pipelines are gstlal, pycbc, mbtaonline, spiir-highmass,
spiir-lowmass.
Burst searches are cwb.allsky, cwb.bbh, cwb.imbh and olib.allsky."""
The external trigger search should not be a part of the above.