Use only needed metrics for Grafana CEPH monitoring

In case we have more then 2000 OSD, each osd process generates hundreds
of metrics, so we need to enable only needed metrics which are shown in
Grafana.

This is a re-work of CR https://gerrit.mcp.mirantis.net/15205

Change-Id: I38d905451e3f33dc805903203b4eda4ccab568c5
1 file changed