mv com/google/domain/registry google/registry

This change renames directories in preparation for the great package
rename. The repository is now in a broken state because the code
itself hasn't been updated. However this should ensure that git
correctly preserves history for each file.

java/google/registry/env/common/META-INF/appengine-application.xml

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8" standalone="no"?>
+<appengine-application xmlns="http://appengine.google.com/ns/1.0">
+  <application>domain-registry</application>
+</appengine-application>