skip osg and condor repos if unavailable

Dockerfile

@@ -12,13 +12,13 @@ RUN curl -s https://packagecloud.io/install/repositories/github/git-lfs/script.r
     dnf clean all
 
 # enable htcondor repo
-RUN dnf -y install https://research.cs.wisc.edu/htcondor/repo/9.0/htcondor-release-current.el8.noarch.rpm
+RUN dnf -y install https://research.cs.wisc.edu/htcondor/repo/9.0/htcondor-release-current.el8.noarch.rpm && \
+    dnf config-manager -q --save --setopt="htcondor.skip_if_unavailable=true" &> /dev/null
 
 # add osg repository
-RUN dnf -y install https://repo.opensciencegrid.org/osg/3.5/osg-3.5-el8-release-latest.rpm
-
-# exclude htcondor from osg repo
-RUN dnf config-manager -q --save --setopt="osg.exclude=*condor*" &> /dev/null
+RUN dnf -y install https://repo.opensciencegrid.org/osg/3.5/osg-3.5-el8-release-latest.rpm && \
+    dnf config-manager -q --save --setopt="osg.skip_if_unavailable=true" &> /dev/null && \
+    dnf config-manager -q --save --setopt="osg.exclude=*condor*" &> /dev/null
 
 # install extra packages
 RUN dnf -y install \