Working out some python3 kinks

tools/scripts/awx-python

@@ -15,4 +15,4 @@ if [ -f /var/lib/awx/venv/awx/bin/activate ]; then
 fi
 
 # Run the requested Python command, using the interpreter from the path
-exec python "$@"
+exec python3 "$@"

tools/scripts/failure-event-handler

@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 import sys
 import os
 import signal