Integration of TE component

Integration of TE component, documentation, and test cases

src/service/service/service_handlers/__init__.py

@@ -85,5 +85,5 @@ SERVICE_HANDLERS = [
             FilterFieldEnum.SERVICE_TYPE  : ServiceTypeEnum.SERVICETYPE_L2NM,
             FilterFieldEnum.DEVICE_DRIVER : [DeviceDriverEnum.DEVICEDRIVER_IETF_L2VPN],
         }
-    ])
+    ]),
 ]