rename completion constants and cleanup comment

pkg/analysis_server/test/services/completion/completion_computer_test.dart

 // Copyright (c) 2014, 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.
 
 library test.services.completion.suggestion;
 
 import 'dart:async';
 
 import 'package:analysis_server/src/protocol.dart';
 import 'package:analysis_server/src/services/completion/completion_manager.dart';
@@ skipping 50 matching lines @@
   @override
   void setUp() {
     super.setUp();
     index = createLocalMemoryIndex();
     searchEngine = new SearchEngineImpl(index);
     source = addSource('/does/not/exist.dart', '');
     perf = new CompletionPerformance();
     manager = new DartCompletionManager.create(context, searchEngine, source);
     suggestion1 = new CompletionSuggestion(
         CompletionSuggestionKind.INVOCATION,
-        COMPLETION_RELEVANCE_DEFAULT,
+        DART_RELEVANCE_DEFAULT,
         "suggestion1",
         1,
         1,
         false,
         false);
     suggestion2 = new CompletionSuggestion(
         CompletionSuggestionKind.IDENTIFIER,
-        COMPLETION_RELEVANCE_DEFAULT,
+        DART_RELEVANCE_DEFAULT,
         "suggestion2",
         2,
         2,
         false,
         false);
     new Future(_performAnalysis);
   }
 
   @override
   void tearDown() {
@@ skipping 112 matching lines @@
   @override
   Future<bool> computeFull(DartCompletionRequest request) {
     this.request = request;
     fullCount++;
     if (fullSuggestion != null) {
       request.suggestions.add(fullSuggestion);
     }
     return new Future.value(fullSuggestion != null);
   }
 }