fix constructor suggestion element names

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

Index: pkg/analysis_server/test/services/completion/completion_test_util.dart
diff --git a/pkg/analysis_server/test/services/completion/completion_test_util.dart b/pkg/analysis_server/test/services/completion/completion_test_util.dart
index dc428541fbd26a18431b7506ef2ed2dae476a2fe..862934d0963a57432083e33cc97da77108f743d9 100644
--- a/pkg/analysis_server/test/services/completion/completion_test_util.dart
+++ b/pkg/analysis_server/test/services/completion/completion_test_util.dart
@@ -206,7 +206,8 @@ abstract class AbstractCompletionTest extends AbstractContextTest {
     protocol.Element element = cs.element;
     expect(element, isNotNull);
     expect(element.kind, equals(protocol.ElementKind.CONSTRUCTOR));
-    expect(element.name, name);
+    int index = name.indexOf('.');
+    expect(element.name, index >= 0 ? name.substring(index + 1) : '');
     return cs;
   }