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.

bin/deploy-eos

@@ -40,6 +40,7 @@ fi
 
 # Directory where the web site has been generated in the CI environment
 # If not provided by the user
+
 if [ -z "$CI_OUTPUT_DIR" ];
 then
 	CI_OUTPUT_DIR="public/"
@@ -60,6 +61,7 @@ fi
 
 # Get credentials
 echo "$EOS_ACCOUNT_PASSWORD" | $kinit "$EOS_ACCOUNT_USERNAME@CERN.CH" 2>&1 >/dev/null
+
 if [ $? -ne 0 ]
 then
 	echo "Failed to get Krb5 credentials for '$EOS_ACCOUNT_USERNAME'"