added class for graphite flot metrics
added class for graphite flot metrics

TelekomCloud/ceph-dash,TelekomCloud/ceph-dash,Aorjoa/aiyara-ceph-dash,Aorjoa/aiyara-ceph-dash,Aorjoa/aiyara-ceph-dash,Crapworks/ceph-dash,Aorjoa/aiyara-ceph-dash,Crapworks/ceph-dash,Aorjoa/aiyara-ceph-dash,Crapworks/ceph-dash,Crapworks/ceph-dash