CA-388527: Keep python2 and python3 compatibility

[stephenchengCloud]

The PR #42 uses keyword-only argument which is not supported in Python2 (led to build errors, although the Python file worked on XS8) . In XS8, we still uses python2, so fix this to work both in python2 and python3

Build success in XS8:

INFO: Done(/tmp/kojienv.crBpR8EVY/scratch/xsconsole-11.0.5-1.1.g52be83b.xs8.src.rpm) Config(pb-stephenche-x8) 0 minutes 5 seconds
INFO: Results and/or logs in: /home/stephenche/xs9/xsconsole.spec/SRPM//build
Finish: run

Build success in XS9:

INFO: Done(/tmp/kojienv.ZZrHfUNdW/scratch/xsconsole-11.0.5-1.1.g52be83b.xs9.src.rpm) Config(pb-stephenche-x9) 0 minutes 4 seconds
INFO: Results and/or logs in: /home/stephenche/xs9/xsconsole.spec/SRPM//build
Finish: run

[liulinC]

It is quite strange that we can not use py3-only syntax for master, to support py2 backward compatibility. (we have python3.11 for XS9 and python3.6 for XS8)

Yangtze is py2 only. Hope we can drop this once Yangtze is EoL.

Another option is we branch yangtze for py2 only and let master goes to py3 only.