move amenity creation to tokenizer

The BDD tests still use the old-style amenity creation scripts
because we don't have simple means to import a hand-crafted
test file of special phrases right now.

nominatim/clicmd/special_phrases.py

@@ -22,10 +22,13 @@ class ImportSpecialPhrases:
 
     @staticmethod
     def run(args):
+        from ..tokenizer import factory as tokenizer_factory
+
         if args.import_from_wiki:
             LOG.warning('Special phrases importation starting')
+            tokenizer = tokenizer_factory.get_tokenizer_for_db(args.config)
             with connect(args.config.get_libpq_dsn()) as db_connection:
                 SpecialPhrasesImporter(
                     args.config, args.phplib_dir, db_connection
-                ).import_from_wiki()
+                ).import_from_wiki(tokenizer)
         return 0