[SEBA-191] Updating the OLT app API

Change-Id: Ic5bb43e072104cf167642f0f57d98d909b2fa73a
diff --git a/xos/synchronizer/steps/sync_volt_service_instance.py b/xos/synchronizer/steps/sync_volt_service_instance.py
index 10091cf..11675a4 100644
--- a/xos/synchronizer/steps/sync_volt_service_instance.py
+++ b/xos/synchronizer/steps/sync_volt_service_instance.py
@@ -36,16 +36,10 @@
         if o.policy_code != 1:
             raise DeferredException("Waiting for ModelPolicy to complete")
 
-
         volt_service = VOLTService.objects.get(id=o.owner_id)
 
-        si = ServiceInstance.objects.get(id=o.id)
-
         log.info("Synching OLTServiceInstance", object=str(o), **o.tologdict())
 
-        c_tag = si.get_westbound_service_instance_properties("c_tag")
-        s_tag = si.get_westbound_service_instance_properties("s_tag")
-
         olt_device = o.onu_device.pon_port.olt_device
 
         try:
@@ -59,27 +53,19 @@
             raise DeferredException("Waiting for OLTDevice %s to be synchronized" % olt_device.name)
 
         log.debug("Adding subscriber with info",
-                 c_tag = c_tag,
-                 s_tag = s_tag,
                  uni_port_id = uni_port_id,
-                 dp_id = olt_device.dp_id)
+                 dp_id = olt_device.dp_id
+        )
 
         # Send request to ONOS
         onos_voltha = Helpers.get_onos_voltha_info(volt_service)
         onos_voltha_basic_auth = HTTPBasicAuth(onos_voltha['user'], onos_voltha['pass'])
 
-        full_url = "%s:%d/onos/olt/oltapp/subscribers" % (onos_voltha['url'], onos_voltha['port'])
+        full_url = "%s:%d/onos/olt/oltapp/%s/%s" % (onos_voltha['url'], onos_voltha['port'], olt_device.dp_id, uni_port_id)
 
-        data = {
-            "deviceId" : olt_device.dp_id,
-            "port" : uni_port_id,
-            "sVlan" : s_tag,
-            "cVlan" : c_tag
-        }
+        log.info("Sending request to onos-voltha", url=full_url)
 
-        log.info("Sending request to onos-voltha", url=full_url, data=data)
-
-        request = requests.post(full_url, auth=onos_voltha_basic_auth, json=data)
+        request = requests.post(full_url, auth=onos_voltha_basic_auth)
 
         if request.status_code != 200:
             raise Exception("Failed to add subscriber in onos-voltha: %s" % request.text)