update to xrd5rc4 (following Ilija https://github.com/slateci/XCache/compare/v5rc4)

xcache.cfg

@@ -52,7 +52,7 @@ else
     oss.path /root:/      r/w
     oss.path /xroot:/     r/w
     ofs.osslib   /usr/lib64/libXrdPss.so
-    pss.cachelib /usr/lib64/libXrdFileCache.so
+    pss.cachelib libXrdPfc.so
     pss.config streams 128
     pss.origin localfile:1094
     pss.namelib -lfncache -lfn2pfn /usr/lib64/XrdName2NameDCP4RUCIO.so
@@ -77,3 +77,6 @@ else
     acc.authrefresh 60
     ofs.authorize
 fi
+
+# resolving bug in rc4
+xrootd.async nosf

xcache.singularity.def

@@ -27,17 +27,18 @@ Purpose Xcache-for-RUCIO
 
 %post
 
-  XRD_VERSION="4.11.3-1.el7.x86_64"
+  XRD_VERSION="5.0.0-0.rc4.el7"
 
   yum install -y curl gperftools hostname
 
+  curl -s -o /etc/yum.repos.d/xrootd-testing-slc7.repo http://www.xrootd.org/binaries/xrootd-testing-slc7.repo
   curl -s -o /etc/yum.repos.d/xrootd-stable-slc7.repo http://www.xrootd.org/binaries/xrootd-stable-slc7.repo
   curl -s -o /etc/pki/rpm-gpg/RPM-GPG-KEY-wlcg http://linuxsoft.cern.ch/wlcg/RPM-GPG-KEY-wlcg
   curl -s -o /etc/yum.repos.d/wlcg-centos7.repo http://linuxsoft.cern.ch/wlcg/wlcg-centos7.repo
 
   yum install -y https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
   yum install -y xrootd-server-${XRD_VERSION} xrootd-client-${XRD_VERSION} xrootd-${XRD_VERSION} python2-xrootd-${XRD_VERSION}
-  yum install -y xrootd-rucioN2N-for-Xcache
+  yum localinstall -y https://repo.opensciencegrid.org/osg/upcoming/el7/testing/x86_64/xrootd-rucioN2N-for-Xcache-1.2-3.1.osgup.el7.x86_64.rpm
   yum install -y vomsxrd
   yum install -y gdb
   yum install -y yum-utils