Clean up modules after shutting down plugins. JM-1069

git-svn-id: http://svn.igniterealtime.org/svn/repos/openfire/trunk@8339 b35dd754-fafc-0310-a699-88a17e54d16e

src/java/org/jivesoftware/openfire/XMPPServer.java

@@ -891,11 +891,11 @@ public class XMPPServer {
             module.stop();
             module.destroy();
         }
-        modules.clear();
         // Stop all plugins
         if (pluginManager != null) {
             pluginManager.shutdown();
         }
+        modules.clear();
         // Stop the Db connection manager.
         DbConnectionManager.destroyConnectionProvider();
         // hack to allow safe stopping