TEP info in ITM config datastore can not be deleted by following the procedure of the ODL document.

• : where we expect to be deleted
  {
  "transport-zones": {
  "transport-zone": [
  {
  "zone-name": "e383ab7e-a92c-4c7c-84cf-e797270799c2",
  "tunnel-type": "odl-interface:tunnel-type-vxlan",
  "subnets": [
  {
  "vteps": [
• { "dpn-id": 229274253668002, "portname": "tunnel_port", "option-of-tunnel": false, "ip-address": "10.0.0.20" }

  ,

  { "dpn-id": 118908811792816, "portname": "tunnel_port", "option-of-tunnel": false, "ip-address": "10.0.0.10" }

  ],
  "gateway-ip": "0.0.0.0",
  "vlan-id": 0
  }
  ]
  }
  ]
  }
  }

Procedure in ODL document::
ITM Tunnel Auto-Configuration
http://docs.opendaylight.org/en/stable-carbon/submodules/genius/docs/specs/itm-tunnel-auto-config.html
　TEP Deletion
When an openvswitch:external_ids:tep-ip parameter gets deleted through ovs-vsctl command, then network topology Operational
DS gets updated via OVSB update notification. ITM which has registered for the network-topology DTCNs, gets notified and this
deletes the TEP from Transport zone or tepsNotHostedInTransportZone stored in ITM config DS based on external_ids:tzname
parameter configured for TEP.

Environment Details
OpenStack Version: stable/ocata
ODL Version: carbon-FR

Reproduction steps:
1. Initialize ODL
2. Connect (Set up) ControllerNode, ComputeNode with ODL
3. Create NW, router, VM
4. Confirm data is created in MD-SAL
restconf/config/itm:transport-zones
5. Delete NW, router, VM
6. Execute the following command in compute node

1. ovs-vsctl remove Open_vSwitch <UUID> external_ids tep-ip="10.0.0.20"

Attachment List:
genius-itm-config.xml
karaf.tar.gz
itm-transportzone.config
network-topology.config
network-topology.operational
controller.ovsdb-client_dump
compute.ovsdb-client_dump

Possible cause:
Unable to get the TransportZone which contains the TEP should be removed.
Karaf log:
2017-09-26 19:26:37,350 | TRACE | nPool-1-worker-3 | OvsdbTepRemoveConfigHelper | 353 - org.opendaylight.genius.itm-impl - 0.2.0.Carbon | Remove TEP: TEP-IP: 10.0.0.20, TZ name: TZA, DPID: 00:00:d0:86:12:72:2e:a2
2017-09-26 19:26:37,351 | TRACE | nPool-1-worker-3 | OvsdbTepRemoveConfigHelper | 353 - org.opendaylight.genius.itm-impl - 0.2.0.Carbon | Removing TEP from unknown TZ into teps-not-hosted-in-transport-zone.
2017-09-26 19:26:37,351 | TRACE | nPool-1-worker-3 | OvsdbTepRemoveConfigHelper | 353 - org.opendaylight.genius.itm-impl - 0.2.0.Carbon | Unhosted TransportZone does not exist. Nothing to do for TEP removal.