Network delete doesnot removed the Vxlan tunnel entries on ovs switch

Build#: Lithium-SR1 Build
Openstack: stable/kilo

local.conf snip
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enable_plugin networking-odl https://github.com/stackforge/networking-odl stable/kilo
Q_PLUGIN=ml2
ENABLE_TENANT_TUNNELS=True
Q_ML2_TENANT_NETWORK_TYPE=vxlan

Problem:
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1.Create Network on openstack(using horizon/cli)

Following flow entries created for specific tunnel.
openflow@os-controller:~/devstack$ sudo ovs-ofctl -O OpenFlow13 dump-flows br-int | grep 439
cookie=0x0, duration=285.661s, table=0, n_packets=8, n_bytes=648, in_port=12,dl_src=fa:16:3e:3d:bd:d9 actions=set_field:0x439->tun_id,load:0x1->NXM_NX_REG0[],goto_table:20
cookie=0x0, duration=283.527s, table=0, n_packets=0, n_bytes=0, tun_id=0x439,in_port=5 actions=load:0x2->NXM_NX_REG0[],goto_table:20
cookie=0x0, duration=283.594s, table=110, n_packets=0, n_bytes=0, priority=8192,tun_id=0x439 actions=drop
cookie=0x0, duration=283.680s, table=110, n_packets=2, n_bytes=140, priority=16383,reg0=0x1,tun_id=0x439,dl_dst=01:00:00:00:00:00/01:00:00:00:00:00 actions=output:12,output:5
cookie=0x0, duration=283.744s, table=110, n_packets=0, n_bytes=0, priority=16384,reg0=0x2,tun_id=0x439,dl_dst=01:00:00:00:00:00/01:00:00:00:00:00 actions=output:12
cookie=0x0, duration=283.810s, table=110, n_packets=0, n_bytes=0, tun_id=0x439,dl_dst=fa:16:3e:3d:bd:d9 actions=output:12

openflow@os-compute1:~/devstack$ sudo ovs-ofctl -O OpenFlow13 dump-flows br-int | grep 439
cookie=0x0, duration=316.031s, table=110, n_packets=0, n_bytes=0, tun_id=0x439,dl_dst=fa:16:3e:3d:bd:d9 actions=output:3

2.After deleting the Network,Expected to delete this tunnel entries from flow table.
But this entries retaining in the ovs-switch both openstack controller and compute node.