update dashboard to show cassandra {store,idx} errors
update dashboard to show cassandra {store,idx} errors

replay/metrictank,raintank/metrictank,raintank/metrictank,OOM-Killer/metrictank,raintank/metrictank,raintank/raintank-metric,raintank/raintank-metric,OOM-Killer/metrictank,OOM-Killer/metrictank,replay/metrictank,raintank/metrictank,replay/metrictank,raintank/raintank-metric,replay/metrictank