Merge remote-tracking branch 'origin/add-ru-docker-image' into integration_2021_wk22

ci-scripts/cls_containerize.py

...nf_files/rcc.band40.tm1.25PRB.FairScheduler.usrpb210.conf

...pts/conf_files/rcc.band7.tm1.if4p5.lo.25PRB.usrpb210.conf

docker/Dockerfile.lteRU.rhel8.2

docker/Dockerfile.lteRU.ubuntu18

docker/scripts/enb_entrypoint.sh

docker/scripts/enb_parameters.yaml

docker/scripts/generateTemplate.py

docker/scripts/lte_ru_entrypoint.sh