software/end-to-end-testing: Add test_master_lopcomm.py

Building on the foundational end-to-end testing framework detailed in our README.md and the implementation in e2e.py in slapoos.core, this MR introduces improvements aimed at enhancing code quality and test coverage.

Major Improvements:

Expanded Test Scenarios: New test methods have been added to BBUTest to evaluate system behavior under various network conditions:

(new)

• ORAN YANG Model Integration: Ensuring that the ORAN YANG model is correctly transmitted to Radio Units (RU) via netconf, crucial for operational control as demonstrated in tests such as test_ue_has_ip, test_txrx_inactive, and test_ru_reset_and_cpri_lock_lost .
• Alarm Testing via ORAN YANG Model: Triggering RU alarms through specific UDP port settings, covered in test_vswr, test_pa_over_current, and test_pa_over_output_power.

(not new)

• Log-Based Testing: Utilizing Amarisoft logs for tests like test_max_rx_sample_db and test_min_rxtx_delay.
• UE Websocket Interaction Testing: Conducting tests that interact with the UE's websocket interface to simulate UE attachment.

These enhancements and tests are designed to build a more robust framework that facilitates the extension of test cases and aims to address a broad spectrum of testing scenarios.

/cc @tomo @xavier_thompson @jhuge @kirr @Tyagov