Add an integration test for analysis.overrides.

pkg/analysis_server/test/integration/analysis/test_all.dart

Index: pkg/analysis_server/test/integration/analysis/test_all.dart
diff --git a/pkg/analysis_server/test/integration/analysis/test_all.dart b/pkg/analysis_server/test/integration/analysis/test_all.dart
index e6cdb198a25cf8a6c80896605b0e6fb7ecc4a967..e834ba4aa62d0ca9cac2439716488ca40beea5e4 100644
--- a/pkg/analysis_server/test/integration/analysis/test_all.dart
+++ b/pkg/analysis_server/test/integration/analysis/test_all.dart
@@ -14,6 +14,7 @@ import 'highlights_test.dart' as highlights_test;
 import 'navigation_test.dart' as navigation_test;
 import 'occurrences_test.dart' as occurrences_test;
 import 'outline_test.dart' as outline_test;
+import 'overrides_test.dart' as overrides_test;
 import 'update_content_test.dart' as update_content_test;
 import 'update_content_list_test.dart' as update_content_list_test;
 
@@ -31,6 +32,7 @@ main() {
     navigation_test.main();
     occurrences_test.main();
     outline_test.main();
+    overrides_test.main();
     update_content_test.main();
     update_content_list_test.main();
   });