berlin e644387ecd Add NVP advanced service check before deleting a router
Since NVP advanced services(LB/FW/VPN) are all routed inserted,
it is necessary to check service in use before deleting a router.
    *If there is one service inserted into the router, it would raise
RouterInUseByXXService error when deleting the router.

Change-Id: I9844f53918cad17cafde0783fe6b69cff246791d
Close-Bug: #1295494
2014-05-26 12:33:09 +08:00
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