Make common tests consistent

pkg/analyzer_plugin/test/utilities/completion/type_member_contributor_test.dart

 // Copyright (c) 2017, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 import 'dart:async';
 
 import 'package:analyzer_plugin/protocol/protocol_common.dart';
 import 'package:analyzer_plugin/utilities/completion/completion_core.dart';
 import 'package:analyzer_plugin/utilities/completion/relevance.dart';
 import 'package:analyzer_plugin/utilities/completion/type_member_contributor.dart';
@@ skipping 3538 matching lines @@
     assertSuggestMethod('compareTo', 'Comparable', 'int');
   }
 
   test_PrefixedIdentifier_trailingStmt_const() async {
     // SimpleIdentifier  PrefixedIdentifier  ExpressionStatement
     addTestSource('const String g = "hello"; f() {g.^ int y = 0;}');
     await computeSuggestions();
     assertSuggestGetter('length', 'int');
   }
 
-//  @soloTest
   test_PrefixedIdentifier_trailingStmt_const_untyped() async {
     // SimpleIdentifier  PrefixedIdentifier  ExpressionStatement
     addTestSource('const g = "hello"; f() {g.^ int y = 0;}');
     await computeSuggestions();
     assertSuggestMethod('toString', 'Object', 'String');
     assertSuggestGetter('length', 'int');
   }
 
   test_PrefixedIdentifier_trailingStmt_field() async {
     // SimpleIdentifier  PrefixedIdentifier  ExpressionStatement
@@ skipping 639 matching lines @@
     assertNotSuggested('foo2');
     assertNotSuggested('bar2');
     assertNotSuggested('_B');
     assertNotSuggested('Y');
     assertNotSuggested('C');
     assertNotSuggested('f');
     assertNotSuggested('x');
     assertNotSuggested('e');
   }
 }