bitbake: persist_data: Use a valid exception for missing implementation

(Bitbake rev: 7254eb6b3e8ef504ef2274541dcc55f1d42238c6)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/bb/persist_data.py

@@ -208,7 +208,7 @@ class SQLTable(collections.abc.MutableMapping):
 
     def __lt__(self, other):
         if not isinstance(other, Mapping):
-            raise NotImplemented
+            raise NotImplementedError()
 
         return len(self) < len(other)