Using real serial_number when looking up OLT

Change-Id: Ie51676c56df08e98a3cf338b9a57c061b36900ff
diff --git a/handlers.go b/handlers.go
index d030fa7..c85f239 100644
--- a/handlers.go
+++ b/handlers.go
@@ -15,7 +15,6 @@
 
 import (
 	"encoding/json"
-	"fmt"
 	"net"
 	"net/http"
 	"strconv"
@@ -78,10 +77,9 @@
 
 	}
 
-	fmt.Println(devices)
-
 	for _, device := range devices.OltDevices {
-		devID := device.Host + ":" + strconv.Itoa(device.Port)
+		// NOTE if it's an OLT then sadisRequestID is the device serial number
+		devID := device.SerialNumber
 		if devID == sadisRequestID {
 			log.Infof("Found OLT device with ID %s", devID)