Pass CVMFS configuration to jupyterhub configuration

This allows the CVMFS host path to be changed and make the jupyterhub
aware of such change. Otherwise, it will just default the path to the
default one (/var/cvmfs).

swan/values.yaml

@@ -27,7 +27,7 @@ cvmfs:
     - cvmfs-config.cern.ch
     - sft.cern.ch
     - sft-nightlies.cern.ch
-  mountOptions:
+  mountOptions: &cvmfsMountOptions
     hostMountpoint: /var/cvmfs
   # Prefetcher is provided only by the daemonSet
   prefetcher:
@@ -236,6 +236,7 @@ jupyterhub:
       deployCsiDriver: *cvmfsDeployCSI
       useCsiDriver: *cvmfsUseCSI
       repositories: *cvmfsRepos
+      mountOptions: *cvmfsMountOptions
     eos:
       deployDaemonSet: *eosDeployDS
       deployCsiDriver: *eosDeployCSI