TimeStampConvert - Error if %fis defined but timestamp has none

[amarbajric]

If the rare but possible occasion occurs where a timestamp has no microseconds because it is exactly at .000 microseconds and was therefore trimmed in the original csv file, the convert timestamp function should handle this edge case.

if '.' not in dt:
     dt = dt + '.0'

This code snippet should only run if the source timestamp format is in UTC and has microseconds BUT the csv file contains this specific edge case