python/pylint: disable no-member check

mypy handles this better -- but we only need the workaround because
pylint under Python 3.6 does not understand that a MutableMapping really
does have a .get() method attached.

We could remove this again once 3.7 is our minimum.

Signed-off-by: John Snow <jsnow@redhat.com>
Message-id: 20210915162955.333025-19-jsnow@redhat.com
Signed-off-by: John Snow <jsnow@redhat.com>

python/setup.cfg

@@ -90,6 +90,7 @@ ignore_missing_imports = True
 # --disable=W".
 disable=consider-using-f-string,
         too-many-function-args,  # mypy handles this with less false positives.
+        no-member,  # mypy also handles this better.
 
 [pylint.basic]
 # Good variable names which should always be accepted, separated by a comma.