Pyixexplorer

Add delay before reading ixConnectToChassisresponse because otherwise it sometimes fails.
- Fix tests and sample.
- Fix more pre-commit issues.

- Connect and disconnect with high level commands - ixDis/connectFromChassis
- Support port reset without statistics reset, this with port CPU reboot allows flexibility in port reset option
- Add add_ports command to manage ports without reservation.
- Adjust tests to pytrafficgen 4.0.0
- Fix many pre-commit issues