This code is designed to filter only status code 200
Used to filter data according to status code which should be used in grunt
before that register this jar in grunt
grunt> A = load '/user/mock' using PigCombinedLog.PigApacheLog.CustomCombinedLog() as
(addr:chararray, logname:chararray, user:chararray, time:chararray, method: chararray,
uri:chararray, proto:chararray, status:int, bytes:int, referer:chararray, userAgent:chararray);
grunt> filterA = filter A by pigUDF.StatusFilter.StatusFilter(status);