[l3vpn_ecmp] Deleting the extra route entries doesn't delete the entries on Local switch

Topology
========
In the Topology I have two compute node,Four VM's running on CN-1 & Two
VM's running on CN-2

Testcase Description
====================
I have an extra route configured and pointing to three of the VM's on CN-1

when i delete the extra route from open stack the extra route is not getting deleted from CN-1 whereas it is getting deleted from CN-2

Flows and groups output
=======================
ON CN-1
--------
cookie=0x8000003, duration=14.366s, table=21, n_packets=0, n_bytes=0, priority=34,ip,metadata=0x30d46/0xfffffe,nw_dst=120.0.0.0/24 actions=group:150006

group_id=150006,type=select,bucket=actions=group:150001,bucket=actions=group:150003,bucket=actions=group:150002
ON CN-2
--------
cookie=0x8000003, duration=132.993s, table=21, n_packets=0, n_bytes=0, priority=34,ip,metadata=0x30d46/0xfffffe,nw_dst=120.0.0.0/24 actions=group:150006

group_id=150006,type=select,bucket=actions=resubmit(,220),set_field:fa:16:3e:c9:4f:71->eth_dst,load:0x200->NXM_NX_REG6[],set_field:0x186aa->tun_id,bucket=actions=resubmit(,220),set_field:fa:16:3e:7d:bd:43->eth_dst,load:0x200->NXM_NX_REG6[],set_field:0x186aa->tun_id,bucket=actions=resubmit(,220),set_field:fa:16:3e:d9:3a:61->eth_dst,load:0x200->NXM_NX_REG6[],set_field:0x186aa->tun_id

Deleting the extra route from Openstack deletes the entries on CN-2 but not on CN-1