Revert "Bump checkstyle from 9.3 to 10.0 (#813)" (#814)
Revert "Bump checkstyle from 9.3 to 10.0 (#813)" (#814)

This reverts commit 49dccf6f1da57666d1353de42611f24cfb165959.
influxdata/influxdb-java,influxdata/influxdb-java