Add discovery service to stable APIs

generated/googleapis/test/freebase/v1_test.dart

 library googleapis.freebase.v1.test;
 
 import "dart:core" as core;
 import "dart:collection" as collection;
 import "dart:async" as async;
 import "dart:convert" as convert;
 
 import 'package:http/http.dart' as http;
 import 'package:http/testing.dart' as http_testing;
 import 'package:unittest/unittest.dart' as unittest;
@@ skipping 468 matching lines @@
         return new async.Future.value(common_test.stringResponse(200, h, resp));
       }), true);
       res.search(asOfTime: arg_asOfTime, callback: arg_callback, cursor: arg_cursor, domain: arg_domain, encode: arg_encode, exact: arg_exact, filter: arg_filter, format: arg_format, help: arg_help, indent: arg_indent, lang: arg_lang, limit: arg_limit, mid: arg_mid, mqlOutput: arg_mqlOutput, output: arg_output, prefixed: arg_prefixed, query: arg_query, scoring: arg_scoring, spell: arg_spell, stemmed: arg_stemmed, type: arg_type, with_: arg_with_, without: arg_without).then(unittest.expectAsync((_) {}));
     });
 
   });
 
 
 }