[VOL-3105] Fix NNI port no calculation for PortStatistics

- Bitshifting in interface_key_to_port_no method in translation.cc is corrected for NNI

Change-Id: Idc0499c43720b4c526e8ccac972c068bcdbf7529
diff --git a/VERSION b/VERSION
index e30309f..f041bc6 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-2.4.7
+2.4.8
diff --git a/agent/src/translation.cc b/agent/src/translation.cc
index bd41b61..03cd0a1 100644
--- a/agent/src/translation.cc
+++ b/agent/src/translation.cc
@@ -20,7 +20,7 @@
 int interface_key_to_port_no(bcmolt_interface_id intf_id, 
         bcmolt_interface_type intf_type) {
     if (intf_type == BCMOLT_INTERFACE_TYPE_NNI) {
-        return (0x1 << 16) + intf_id;
+        return (0x1 << 20) + intf_id;
     }
     if (intf_type == BCMOLT_INTERFACE_TYPE_PON) {
         return (0x2 << 28) + intf_id;