Preliminary fix for packet capture loss

Interface offloading was not being turned off during setup

install_scripts/disable-checksum-offload.sh

@@ -0,0 +1,9 @@
+#!/bin/bash
+
+if [ "$NM_DISPATCHER_ACTION" == "pre-up" ]; then
+    if ["$DEVICE_IFACE" !== "$MAININT"]; then
+        for i in rx tx sg tso ufo gso gro lro; do 
+            ethtool -K $DEVICE_IFACE $i off; 
+        done
+    fii
+fi