[CSV-145] CSVFormat.with* methods clear the header comments

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/csv/trunk@1641845 13f79535-47bb-0310-9956-ffa450edef68
1.1 is out.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/csv/trunk@1641953 13f79535-47bb-0310-9956-ffa450edef68