`maxRecords` flag does not apply to write operations

[aymkhalil]

I'm using dsbulk DataStax Bulk Loader v1.10.0 to unload a table into via a CSV connector. It seems the maxRecords flag applies only to read operations, but not write:

• Documentation from REAME: https://github.com/datastax/dsbulk/blob/1.x/manual/settings.md#-maxrecords--connectorcsvmaxrecords--dsbulkconnectorcsvmaxrecords-number
• Relevant code that seems to be applied to read only: https://github.com/datastax/dsbulk/blob/44fe069f382804de4ad5e24ad55166917e053e26/connectors/commons/src/main/java/com/datastax/oss/dsbulk/connectors/commons/AbstractFileBasedConnector.java#L526
• Relevant unit tests: https://github.com/datastax/dsbulk/blob/44fe069f382804de4ad5e24ad55166917e053e26/connectors/csv/src/test/java/com/datastax/oss/dsbulk/connectors/csv/CSVConnectorTest.java#L904
• Executed command:

  java -jar dsbulk-1.10.0.jar unload -k ks1 -t table1 --connector.csv.url here/data --connector.csv.maxRecords 1 --connector.csv.maxConcurrentFiles 1 -verbosity max

• Unexpected Output (number of records is 20 - header included)

  wc here/data/output-000001.csv
    20      26     262 here/data/output-000001.csv

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