Specify how group key is handled in rename/drop spec (#524)
Specify how group key is handled in rename/drop spec (#524)

* Specify how group key is handled in rename/drop spec

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