Disable a test that times out on the bots

pkg/analysis_server/test/integration/server/set_subscriptions_test.dart

Index: pkg/analysis_server/test/integration/server/set_subscriptions_test.dart
diff --git a/pkg/analysis_server/test/integration/server/set_subscriptions_test.dart b/pkg/analysis_server/test/integration/server/set_subscriptions_test.dart
index 3316ddf692f35e2c18f0d997efe48800df27b130..9ec4f3fcf4911f5cea549e0095a27c7b085f2784 100644
--- a/pkg/analysis_server/test/integration/server/set_subscriptions_test.dart
+++ b/pkg/analysis_server/test/integration/server/set_subscriptions_test.dart
@@ -67,4 +67,12 @@ class SetSubscriptionsTest extends AbstractSetSubscriptionsTest {}
 class SetSubscriptionsTest_Driver extends AbstractSetSubscriptionsTest {
   @override
   bool get enableNewAnalysisDriver => true;
+
+  @failingTest
+  @override
+  test_setSubscriptions() {
+    // This test times out on the bots and has been disabled to keep them green.
+    // We need to discover the cause and re-enable it.
+    fail('Timed out');
+  }
 }