Slightly cleaner method of shutting down database connection manager.

git-svn-id: http://svn.igniterealtime.org/svn/repos/wildfire/trunk@5420 b35dd754-fafc-0310-a699-88a17e54d16e

src/java/org/jivesoftware/wildfire/XMPPServer.java

@@ -812,7 +812,7 @@ public class XMPPServer {
             pluginManager.shutdown();
         }
         // Stop the Db connection manager.
-        DbConnectionManager.getConnectionProvider().destroy();
+        DbConnectionManager.destroyConnectionProvider();
         // hack to allow safe stopping
         Log.info("Wildfire stopped");
     }