Threat feeds should support python3

[VectraStuart]

Environment

Operating system: Linux
Python version: 3
VAT version: latest
Vectra version: 4.11

Expected behavior

Threat feeds works in python3

Actual behavior

Threat feeds does not work in python3, the print statements need parentheses

Steps to reproduce

Run the threat feed in python3.

[HoneyBaked]

I agree, the threat feeds sample script needs to be updated to support python 3.