removed fixed versions for xroot; xroot install now before gfal2

Dockerfile

@@ -18,16 +18,15 @@ RUN yum -y install voms globus-gsi-sysconfig globus-gsi-cert-utils globus-gssapi
 # Condor client
 RUN yum -y install condor condor-python
 
+# Xroot
+RUN yum -y install xrootd-python xrootd-client xrootd-libs xrootd-client-libs
+
 # SRM todo: test removing globus deps
 RUN yum -y install gfal2-all gfal2-python gfal2-util globus-ftp-client \
                    globus-gass-transfer globus-ftp-control globus-xio globus-gssapi-error \
                    globus-gsi-sysconfig globus-gsi-openssl-error globus-openssl-module \
                    globus-gsi-proxy-ssl
 
-# Xroot
-RUN yum -y install xrootd-python-4.7.1-1.osg34.el7 xrootd-client-4.7.1-1.osg34.el7 \
-                   xrootd-libs4.7.1-1.osg34.el7 xrootd-client-libs4.7.1-1.osg34.el7
-
 # MW env
 COPY docker/etf-cms/config/grid-env.sh /etc/profile.d/
 RUN echo "source /etc/profile.d/grid-env.sh" >> /opt/omd/sites/$CHECK_MK_SITE/.profile