Make "--no-packages-dir" the default.

test/get/hosted/stay_locked_if_compatible_test.dart

Index: test/get/hosted/stay_locked_if_compatible_test.dart
diff --git a/test/get/hosted/stay_locked_if_compatible_test.dart b/test/get/hosted/stay_locked_if_compatible_test.dart
index 75f07b0444eea8f4ccf032820ead2dbf0d1b4d6f..ad82344d8ca41cae532c0fa36f2459f401c13722 100644
--- a/test/get/hosted/stay_locked_if_compatible_test.dart
+++ b/test/get/hosted/stay_locked_if_compatible_test.dart
@@ -14,7 +14,7 @@ main() {
 
     pubGet();
 
-    d.packagesDir({"foo": "1.0.0"}).validate();
+    d.appPackagesFile({"foo": "1.0.0"}).validate();
 
     globalPackageServer.add((builder) => builder.serve("foo", "1.0.1"));
 
@@ -22,6 +22,6 @@ main() {
 
     pubGet();
 
-    d.packagesDir({"foo": "1.0.0"}).validate();
+    d.appPackagesFile({"foo": "1.0.0"}).validate();
   });
 }