Multiple TG results files can cause wrong file to be shared

[nrferguson]

Raise an exception if there is more than one TG results CSV in the TG data directory.

cmap_trip-based_model/Scripts/share/standard_data/src/standard_data.py

Line 185 in 408c748

file = sorted(tg_dir.joinpath('data').glob('tg_results*.csv'))[0]