Fix deploy-eos-xrdcp.sh for new version of xrdcp
Follow up in INC3276527.
This solves the issue of the new version of xrootd
not being able to copy just the files but to copy the whole public/
folder (together with the files).
This MR installs the xrootd-client
version 5.5.1-1.el7
.
Edited by Ismael Posada Trobo