By default, don't use observatory during integration tests.

pkg/analysis_server/test/integration/integration_tests.dart

Index: pkg/analysis_server/test/integration/integration_tests.dart
diff --git a/pkg/analysis_server/test/integration/integration_tests.dart b/pkg/analysis_server/test/integration/integration_tests.dart
index 21b080ad275c1e1584fe306c9bcb8dd4e7a309e0..28e6b5dcf4b5ee0b5db73575cbedafe528bebf29 100644
--- a/pkg/analysis_server/test/integration/integration_tests.dart
+++ b/pkg/analysis_server/test/integration/integration_tests.dart
@@ -685,7 +685,7 @@ class Server {
    * "--pause-isolates-on-exit", allowing the observatory to be used.
    */
   Future start(NotificationProcessor notificationProcessor, {bool debugServer:
-      false, bool profileServer: true}) {
+      false, bool profileServer: false}) {
     if (_process != null) {
       throw new Exception('Process already started');
     }