Change Controller's default update-limit to 1

If Controller.run_as_update()'s update_limit parameter is zero, the method will attempt to iteratively update up to an infinite number of update intervals (i.e., endtime-starttime) back in time. Sometimes this is desirable, usually not.

The default command line parameter is currently set to zero, and should be changed to 1. The relevant portion of Controller.py is:

https://code.usgs.gov/ghsc/geomag/geomag-algorithms/-/blob/195144cae84768563e640f01ff07b0efb6951212/geomagio/Controller.py#L1085-L1095

assigned to @awernle

mentioned in merge request !204 (merged)

mentioned in commit 0c283efb

closed with merge request !204 (merged)