On interface deletion - make sure any vlan qinq table is cleared
On interface deletion - make sure any vlan qinq table is cleared

Change-Id: Ie9bb1cfce2369b448ca55a21b2f8b8bbbb81c59c
Signed-off-by: John Lo <e676165d137051a9de0d8979abbff6c5d0ccb4f0@cisco.com>

chrisy/vpp,FDio/vpp,FDio/vpp,FDio/vpp,vpp-dev/vpp,chrisy/vpp,chrisy/vpp,FDio/vpp,FDio/vpp,FDio/vpp,vpp-dev/vpp,vpp-dev/vpp,chrisy/vpp,chrisy/vpp,FDio/vpp,vpp-dev/vpp,chrisy/vpp,FDio/vpp,vpp-dev/vpp,vpp-dev/vpp,vpp-dev/vpp,chrisy/vpp,chrisy/vpp