StorageClassName: standard does not always do what we want

[chaen]

diracx-charts/diracx/templates/diracx/cs-store-volume.yml

Line 33 in 8ad3ec2

storageClassName: {{ .Values.global.storageClassName }}

Having this to stadard prevented to install the chart fresh on OpenShift. The reason is that Openshift at CERN does not define that type of storageclass

NAME                   PROVISIONER                       RECLAIMPOLICY   VOLUMEBINDINGMODE   ALLOWVOLUMEEXPANSION   AGE
cephfs (default)       cephfs.manila.csi.openstack.org   Retain          Immediate           true                   190d
cephfs-no-backup       cephfs.manila.csi.openstack.org   Retain          Immediate           true                   190d
cephfs-ssd             cephfs.manila.csi.openstack.org   Retain          Immediate           true                   190d
cephfs-ssd-no-backup   cephfs.manila.csi.openstack.org   Retain          Immediate           true                   190d
cvmfs                  cvmfs.csi.cern.ch                 Delete          Immediate           false                  599d
eos                    eosxd.csi.cern.ch                 Delete          Immediate           false                  449d

So either we are a bit smarter (e.g. testing if the value is defined, otherwise leave empty) or we make the value mandatory