Removed my own hardcoded plugin library path in the xroot configuration file...

Removed my own hardcoded plugin library path in the xroot configuration file and updated instructions to create appropriate soft links

xroot_plugins/xrd.cf.cta

 # Load the plugin XrdCtaOfs
-xrootd.fslib /home/dkruse/CTA/build/xroot_plugins/libXrdCtaOfs.so
+xrootd.fslib /usr/lib64/libXrdCtaOfs.so
 
 # Use the Kerberos 5 security module
 xrootd.seclib libXrdSec.so