Docker and Deployment improvements

The following improvements:

• Image generation for eNB --> template for configuration files and dedicated entrypoint in Ubuntu
  • To be generalized once validated to gNB/UEs and RHEL8
• Docker-compose-based EPC deploy
• Traffic test fully validated using the trf-gen container
• Flexran-rtc support when deployed in a container
  • Not fully done for the X2 Handover part
• Functional and logging update of nsa fr1 (logging valid for gNB terminate as well)
• Added docker-compose-based eNB deployment
• Retrieve logs for such eNB deploymnent
• added more ping stats + gNB markers (pb receiving samples)