add test for updating non-existent labels
add test for updating non-existent labels

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