Fixed onos-log so ctrl-c will only kill the current monitor an added onos-log-kill command to kill all monitors.

Change-Id: Id76b13f801aae0d9878baa265601717ef20613c8
diff --git a/tools/test/bin/onos-log b/tools/test/bin/onos-log
index 774a9d3..0022a95 100755
--- a/tools/test/bin/onos-log
+++ b/tools/test/bin/onos-log
@@ -23,12 +23,11 @@
 if [ $less -eq 1 ]; then
     ssh -t $remote "less $LOG"
 else
-    trap "ssh $remote 'ps -ef | grep \"tail -n 512\" | grep -v grep | cut -c10-15 | xargs kill'" EXIT
     ssh -t $remote "
     while true; do
         echo ==================================================================
         [ ! -f $LOG ] && sleep 2 && continue
-        tail -n 512 --follow=name $LOG --sleep-interval 2
+        tail -n 512 --follow=name $LOG --pid \$$ --sleep-interval 2
     done
     "
 fi