Ported Fault Tolerant AbstractHDFSExactlyOnceWriter operator

     * Added counters to track total time and bytes written.
     * refactored HdfsExactlyOnceOutputOperator to use AbstractHDFSExactlyOnceWriter
     * deprecated AbstractHdfsFileOutputOperator
     * removed obsolete AbstractHdfsOutputOperator
     * removed obsolete AbstractHdfsRollingFileOutputOperator
     * removed obsolete HdfsOutputTupleInterface
     * removed unused benchmark HDFSBothInputOutputOperatorsBenchmark
     * modified HDFSOutputOperatorBenchmark to use fault tolerant writer
     * Updated Fraud detection demo to use fault tolerant writer
     * Updated map reduce demo to use fault tolerant writer
This map is not cleaned if the append mode is set to true. Should the cleaning be passed to the concrete implementation?