Installed Python scripts assume python2 is the default

Python scripts rely on the operating system's default version of Python, but syntactically they require Python2. One example is /opt/HPCCSystems/sbin/cluster_script.py:

#!/usr/bin/env python

import sys
import os
import os.path
import getopt
import Queue
import time
import datetime
import logging
import ConfigParser
import signal

The module names Queue and ConfigParser are specific to Python2. The Python3 versions are 'queue' and 'configparser'. The shebang line indicates that we'll accept whatever version of Python the OS is referencing. The upshot is that if a user has set Python3 as the default then this script will fail.

This could be solved by either explicitly requiring Python2 in the shebang, or simply via documentation.