Group entries not getting removed after deletion of l3vpn

Group entries should be removed once l3vpn deleted. This entries will be created during creation of l3vpn.

Please find the flows and groups output after deletion of VPN.

stack@compute-node1:~/devstack$ sudo ovs-ofctl dump-groups -O Openflow13 br-int
OFPST_GROUP_DESC reply (OF1.3) (xid=0x2):
group_id=150001,type=indirect,bucket=actions=set_field:fa:16:3e:6f:b7:0a->eth_dst,output:2
group_id=209999,type=all,bucket=actions=set_field:0x4->tun_id,resubmit(,55)
group_id=150002,type=indirect,bucket=actions=set_field:fa:16:3e:c5:f3:7c->eth_dst,output:3
group_id=210002,type=all,bucket=actions=set_field:0x6->tun_id,resubmit(,55),bucket=actions=set_field:0x1389->tun_id,output:1
group_id=210001,type=all,bucket=actions=set_field:0x6->tun_id,resubmit(,55)
group_id=210000,type=all,bucket=actions=set_field:0x4->tun_id,resubmit(,55),bucket=actions=set_field:0x1388->tun_id,output:1
stack@compute-node1:~/devstack$ sudo ovs-ofctl dump-flows -O Openflow13 br-int
OFPST_FLOW reply (OF1.3) (xid=0x2):
cookie=0x8000001, duration=896.350s, table=0, n_packets=203, n_bytes=21507, priority=5,in_port=1 actions=write_metadata:0x30000000000/0x1fffff0000000000,goto_table:36
cookie=0x8000000, duration=696.234s, table=0, n_packets=25, n_bytes=2434, priority=4,in_port=2 actions=write_metadata:0x40000000000/0xffffff0000000000,goto_table:16
cookie=0x8000000, duration=661.044s, table=0, n_packets=21, n_bytes=2098, priority=4,in_port=3 actions=write_metadata:0x60000000000/0xffffff0000000000,goto_table:16
cookie=0x6800000, duration=696.143s, table=16, n_packets=3, n_bytes=1014, priority=50,udp,dl_src=fa:16:3e:6f:b7:0a,tp_src=68,tp_dst=67 actions=write_actions(CONTROLLER:65535)
cookie=0x6800000, duration=661.026s, table=16, n_packets=3, n_bytes=1014, priority=50,udp,dl_src=fa:16:3e:c5:f3:7c,tp_src=68,tp_dst=67 actions=write_actions(CONTROLLER:65535)
cookie=0x6800000, duration=1011.283s, table=16, n_packets=40, n_bytes=2504, priority=0 actions=goto_table:17
cookie=0x8040000, duration=41.666s, table=17, n_packets=0, n_bytes=0, priority=3,metadata=0x60000000000/0xffffff0000000000 actions=write_metadata:0x8000061389000000/0xffffffffff000000,goto_table:50
cookie=0x8040000, duration=31.675s, table=17, n_packets=0, n_bytes=0, priority=3,metadata=0x40000000000/0xffffff0000000000 actions=write_metadata:0x8000041388000000/0xffffffffff000000,goto_table:50
cookie=0x1030000, duration=1011.283s, table=20, n_packets=0, n_bytes=0, priority=0 actions=goto_table:80
cookie=0x8000003, duration=1011.283s, table=21, n_packets=3, n_bytes=126, priority=0 actions=goto_table:80
cookie=0x9000000, duration=898.341s, table=36, n_packets=179, n_bytes=20227, priority=5,tun_id=0 actions=CONTROLLER:65535
cookie=0x9001388, duration=676.116s, table=36, n_packets=12, n_bytes=608, priority=5,tun_id=0x1388 actions=write_actions(group:210000)
cookie=0x9000004, duration=675.581s, table=36, n_packets=0, n_bytes=0, priority=5,tun_id=0x4 actions=output:2
cookie=0x9001389, duration=624.543s, table=36, n_packets=9, n_bytes=378, priority=5,tun_id=0x1389 actions=write_actions(group:210002)
cookie=0x9000006, duration=624.488s, table=36, n_packets=0, n_bytes=0, priority=5,tun_id=0x6 actions=output:3
cookie=0x8051388, duration=675.725s, table=50, n_packets=12, n_bytes=608, priority=20,metadata=0x41388000000/0x1fffffffff000000,dl_src=fa:16:3e:6f:b7:0a actions=goto_table:51
cookie=0x8051389, duration=624.493s, table=50, n_packets=9, n_bytes=378, priority=20,metadata=0x61389000000/0x1fffffffff000000,dl_src=fa:16:3e:c5:f3:7c actions=goto_table:51
cookie=0x8050000, duration=1011.283s, table=50, n_packets=0, n_bytes=0, priority=0 actions=CONTROLLER:65535,goto_table:51
cookie=0x8031388, duration=675.554s, table=51, n_packets=0, n_bytes=0, priority=20,metadata=0x1388000000/0xffff000000,dl_dst=fa:16:3e:6f:b7:0a actions=output:2
cookie=0x8031388, duration=644.650s, table=51, n_packets=0, n_bytes=0, priority=20,metadata=0x1388000000/0xffff000000,dl_dst=fa:16:3e:00:a3:b4 actions=set_field:0x5->tun_id,output:1
cookie=0x8031389, duration=624.484s, table=51, n_packets=0, n_bytes=0, priority=20,metadata=0x1389000000/0xffff000000,dl_dst=fa:16:3e:c5:f3:7c actions=output:3
cookie=0x8031389, duration=594.313s, table=51, n_packets=0, n_bytes=0, priority=20,metadata=0x1389000000/0xffff000000,dl_dst=fa:16:3e:c4:b2:59 actions=set_field:0x7->tun_id,output:1
cookie=0x8030000, duration=1011.283s, table=51, n_packets=21, n_bytes=986, priority=0 actions=goto_table:52
cookie=0x8701388, duration=676s, table=52, n_packets=12, n_bytes=608, priority=5,metadata=0x1388000000/0xffff000000 actions=write_actions(group:210000)
cookie=0x8701389, duration=624.536s, table=52, n_packets=9, n_bytes=378, priority=5,metadata=0x1389000000/0xffff000000 actions=write_actions(group:210002)
cookie=0x8800004, duration=675.758s, table=55, n_packets=12, n_bytes=608, priority=10,tun_id=0x4,metadata=0x40000000000/0x1fffff0000000000 actions=drop
cookie=0x8800006, duration=624.497s, table=55, n_packets=9, n_bytes=378, priority=10,tun_id=0x6,metadata=0x60000000000/0x1fffff0000000000 actions=drop
cookie=0x8800004, duration=675.771s, table=55, n_packets=12, n_bytes=608, priority=9,tun_id=0x4 actions=output:2
cookie=0x8800006, duration=624.501s, table=55, n_packets=9, n_bytes=378, priority=9,tun_id=0x6 actions=output:3
stack@compute-node1:~/devstack$