Draft: Grafana implementation for E2SM-KPM

• add option -a to overwrite NEAR_RIC_IP
• add option -d to overwrite DB_DIR
• add option -n to overwrite DB_NAME
• properly log the err_msg if DB creation failed
• E2SM-KPM DB implemented with Grafana plugin

TODO:

• check the bare-metal testbed without sudo permissions
• test docker deployment and write its steps in README