[cta_eos] Preparation to merge with master

cmdline/CMakeLists.txt

...egration/docker/ctafrontend/cc7/opt/run/bin/ctaeos-mgm.sh

...cker/ctafrontend/cc7/opt/run/bin/eos_configure_preprod.sh

eos_wfe_scripts/delete_archive_file

eos_wfe_scripts/retrieve_archive_file

xroot_plugins/xrootd-cta.cfg

xroot_rpms/.gitignore

xroot_rpms/Dockerfile

xroot_rpms/README.md

xroot_rpms/build_rpms

xroot_rpms/get_rpms