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

pkg/analysis_server/test/search/search_domain_test.dart

Index: pkg/analysis_server/test/search/search_domain_test.dart
diff --git a/pkg/analysis_server/test/search/search_domain_test.dart b/pkg/analysis_server/test/search/search_domain_test.dart
index 09749ac4f8046b3a1f1b649b00493710532bb564..c8409b8447fbfd3a43627b30235ee6ea939ddca8 100644
--- a/pkg/analysis_server/test/search/search_domain_test.dart
+++ b/pkg/analysis_server/test/search/search_domain_test.dart
@@ -31,8 +31,8 @@ main() {
         serverChannel,
         resourceProvider,
         new MockPackageMapProvider(),
-        null);
-    server.defaultSdk = new MockSdk();
+        null,
+        new MockSdk());
     handler = new SearchDomainHandler(server);
   });