fix(storage): reduce tsm level metrics cardinality
fix(storage): reduce tsm level metrics cardinality

This should have cut off TSM file levels at 4+.

mark-rushakoff/influxdb,nooproblem/influxdb,influxdb/influxdb,influxdb/influxdb,nooproblem/influxdb,influxdb/influxdb,nooproblem/influxdb,li-ang/influxdb,nooproblem/influxdb,mark-rushakoff/influxdb,mark-rushakoff/influxdb,influxdata/influxdb,li-ang/influxdb,influxdb/influxdb,influxdb/influxdb,nooproblem/influxdb,influxdb/influxdb,mark-rushakoff/influxdb,mark-rushakoff/influxdb,mark-rushakoff/influxdb,influxdata/influxdb