add process debugging when things fail

This adds additional debug information to try to catch artifacts
for keystone-all failing to shut down. In future we'll generalize
it into worlddump, but right now it's good debug to keep around.

Change-Id: Id62fb2ddeae2001313e98e567f5c227a8f2fadc6

inc/upgrade

@@ -160,6 +160,9 @@ function ensure_services_stopped {
     done
 
     if [[ -n "$still_running" ]]; then
+        # TODO(sdague): work around because worlddump is apparently misconfigured
+        ps auxw
+        ss -p -t -o state established '( dport = :5000 or dport = :35357 )'
         die $LINENO "The following services are still running: $still_running"
     fi
 }