testing: Make per-CPU SAs scenarios more predictable by pinning IRQs to vCPUs

This ensures that packets on sun are processed on a particular CPU and
not randomly on one, which causes expected SAs not to get created or
other weird things.

testing/hosts/default/usr/local/bin/collect-results

@@ -1,4 +1,4 @@
-#! /bin/bash
+#!/bin/bash
 
 while getopts "46idt:lr" opt
 do