As a temporary measure, allow SDK to be specified on analysis server cmd line.

pkg/analysis_server/test/analysis_abstract.dart

Index: pkg/analysis_server/test/analysis_abstract.dart
diff --git a/pkg/analysis_server/test/analysis_abstract.dart b/pkg/analysis_server/test/analysis_abstract.dart
index ddafba7e33f0d12dfb329d19333eeb5fa9113444..e14d3d1cd6dd9b6c6fe4ece31384217d6c562274 100644
--- a/pkg/analysis_server/test/analysis_abstract.dart
+++ b/pkg/analysis_server/test/analysis_abstract.dart
@@ -228,8 +228,8 @@ class AbstractAnalysisTest {
     packageMapProvider = new MockPackageMapProvider();
     Index index = createIndex();
     server = new AnalysisServer(
-        serverChannel, resourceProvider, packageMapProvider, index);
-    server.defaultSdk = new MockSdk();
+        serverChannel, resourceProvider, packageMapProvider, index,
+        new MockSdk());
     handler = new AnalysisDomainHandler(server);
     // listen for notifications
     Stream<Notification> notificationStream = serverChannel.notificationController.stream;