Use mocked geopy.geocoders.Nominatim to avoid ReadTimeoutError

[schlunma]

Description

Use a mocked version of geopy.geocoders.Nominatim to avoid ReadTimeoutError.

Closes #1982

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[codecov]

Codecov Report

Merging #2005 (3243947) into main (435ade0) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main    #2005   +/-   ##
=======================================
  Coverage   92.79%   92.79%           
=======================================
  Files         236      236           
  Lines       12438    12438           
=======================================
  Hits        11542    11542           
  Misses        896      896           

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[valeriupredoi]

very cool! And pytest-ed the old class too, cheers @schlunma

[valeriupredoi]

excellent, gents @schlunma and @bouweandela - gonna go do some clean up now in light of this 🧹