Added a python 3 version of the alive script

Author: pmeenan

alive3.sh

@@ -0,0 +1,11 @@
+#!/bin/bash
+
+# Watchdog helper script to auto-reboot the system if the agent stops working.
+# Add a test-binary entry to /etc/watchdog.conf and start the watchdog service:
+# test-binary = /home/ubuntu/wptagent/alive.sh
+
+: ${UBUNTU_VERSION:=`(lsb_release -rs | cut -b 1,2)`}
+
+DIR="$(cd "$(dirname "$0")" && pwd)"
+rm /var/log/watchdog/* || true
+python3 $DIR/alive.py --file /tmp/wptagent