Update the analysis server integration tests to always run on the analysis driver.

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

Index: pkg/analysis_server/test/integration/analysis/occurrences_test.dart
diff --git a/pkg/analysis_server/test/integration/analysis/occurrences_test.dart b/pkg/analysis_server/test/integration/analysis/occurrences_test.dart
index 88fe2094e4730d4959a4584d2dcaa451437852b3..426aa1c98fe02fb9494db28ccd11e5955d99c0a5 100644
--- a/pkg/analysis_server/test/integration/analysis/occurrences_test.dart
+++ b/pkg/analysis_server/test/integration/analysis/occurrences_test.dart
@@ -11,11 +11,11 @@ import '../integration_tests.dart';
 main() {
   defineReflectiveSuite(() {
     defineReflectiveTests(OccurrencesTest);
-    defineReflectiveTests(OccurrencesTest_Driver);
   });
 }
 
-class AbstractOccurrencesTest extends AbstractAnalysisServerIntegrationTest {
+@reflectiveTest
+class OccurrencesTest extends AbstractAnalysisServerIntegrationTest {
   test_occurrences() {
     String pathname = sourcePath('test.dart');
     String text = r'''
@@ -65,12 +65,3 @@ main() {
     });
   }
 }
-
-@reflectiveTest
-class OccurrencesTest extends AbstractOccurrencesTest {}
-
-@reflectiveTest
-class OccurrencesTest_Driver extends AbstractOccurrencesTest {
-  @override
-  bool get enableNewAnalysisDriver => true;
-}