NoiseAgent order event times bug in ABIDES-market demo about abides-jpmc-public

[phaelicks]

Found the problem: the event times for NoiseAgent events are stored in scientific format in the logs, e.g. as 1.6125178564189658e+18. When parsing the logs to a dataframe via the function parse_logs_df in line 133 of abides_core.utils.py, the event time is checked to be in (int, np.int64) . Since the scientific format is of type floatthe event time is set to 0 in this line.

This si only be a problem with parsing the logs to a dataframe and should not cause any issues elsewhere. The event times for Noise agents are still recorded correctly in nanoseconds.