fix imp python module for versions higher than 3.4

[NarineM]

Based on https://docs.python.org/3.6/library/imp.html imp has been deprecated starting python version 3.4

[NarineM]

Not able to repro on python 3.6, Can run import imp on python 3.4 as well as with python 3.6. Putting this change on hold (not needed). The module was replacedwith importlib but it is still present in 3.4/3.6. We ll need to revisit this code to take this fix in the future if it is removed from newer versions of python

[matthew-rollitt]

This isn't enough https://docs.python.org/dev/whatsnew/3.12.html#imp

on line 54 you also need to do this

import importlib.util
import importlib.machinery

def load_source(modname, filename):
loader = importlib.machinery.SourceFileLoader(modname, filename)
spec = importlib.util.spec_from_file_location(modname, filename, loader=loader)
module = importlib.util.module_from_spec(spec)
# The module is always executed and not cached in sys.modules.
# Uncomment the following line to cache the module.
# sys.modules[module.name] = module
loader.exec_module(module)
return module