Multiple scripts import concore2 module which doesn't exist in the repository

[GaneshPatil7517]

@pradeeban
Several scripts across the codebase import a concore2 module that is not present in the repository:

testsou/mix.py — import concore2
testsou/powermetermax.py — import concore2
measurements/comm_node_test.py — import concore2
nintan/powermetermax.py — import concore2

These scripts use concore2.delay, concore2.inpath, concore2.outpath, concore2.simtime, concore2.read(), concore2.write(), concore2.unchanged() — essentially a second concore instance for multi-port nodes. However, concore2.py is not in the repository, not in requirements.txt, not documented in README.md, and not generated by mkconcore.py. This means these scripts will crash with ModuleNotFoundError when run.

[pradeeban]

I believe these may work if we replace concore2 with concore in these files. At some point, the current concore was referred as concore2 (as it was the second edition.)