When label monitoring_storage_class_name is specified
dashboards altered using the grafana UI are now
persisted if the pod is terminated.
It is still recommended that the user utilizes a
kubernetes configMap to persist the dashboard.
task: 39514
story: 2006765
Depends-On: I42117837e8e3cd03f3cb723df4d73692ead0d169
Change-Id: Ieb90605182626869528349a7fdeed65061914bcb
Signed-off-by: Diogo Guerra <diogo.filipe.tomas.guerra@cern.ch>