Github PR fix CLA error

@zamblauskas The last commit at https://github.com/zamblauskas/logstash-filter-csv/commit/c3ad44a9dd750537263be729887967476114b3f1 was made with an robe****@ig****se.com email address. I guess you need to either revert the author for this commit (and update the branch) or sign the CLA again.