Avoid redundant calls to "pub list" when multiple dependencies change.

pkg/analysis_server/test/source/test_all.dart

Index: pkg/analysis_server/test/source/test_all.dart
diff --git a/pkg/analysis_server/test/source/test_all.dart b/pkg/analysis_server/test/source/test_all.dart
index 3a3e7090a7f11acc53794219046c7526b1d21fed..34a617f3daf7204d7f43be3beff23cce71333d0b 100644
--- a/pkg/analysis_server/test/source/test_all.dart
+++ b/pkg/analysis_server/test/source/test_all.dart
@@ -5,10 +5,13 @@
 library test.source;
 
 import 'caching_put_package_map_provider_test.dart' as caching_provider_test;
+import 'optimizing_pub_package_map_provider_test.dart'
+    as optimizing_provider_test;
 import 'package:unittest/unittest.dart';
 
 /// Utility for manually running all tests.
 main() {
   groupSep = ' | ';
   caching_provider_test.main();
+  optimizing_provider_test.main();
 }