build-rki-csvs: remove strict ags set check

In oct 2021 the AGS 16056 disappeared from
the RKI data set. That is, lacking_wrt_ref

was not

  set([11000, 3152])

anymore but

  set([11000, 3152, 16056])

which is when the program expectedly
crashed, leading up to issue #1748.

Now, deal with unexpected loss of a
column. This is accomodated for in the
epsilon merge tool which forward-fills
a column when it's in the base but not in
the extension.

tools/build-rki-csvs.py

@@ -173,7 +173,9 @@ def fetch_and_clean_data():
 
     # The reference set has one AGS for entire Berlin -> what follows is
     # expected.
-    assert lacking_wrt_ref == set([11000, 3152])
+    #assert lacking_wrt_ref == set([11000, 3152])
+    # AGS 3152 appeared in April 2020
+    #assert lacking_wrt_ref == set([11000])
 
     added_wrt_ref = set([c for c in df_all_agss]) - set(ags_list_ref)
     log.info("on top of ref AGS list: %s", added_wrt_ref)