Fix EI_EXPOSE_REP in DataStreamRequest implementations

// DataStreamRequestByteBuffer
// DataStreamRequestFilePositionCount
// DataStreamRequestByteBuf
// DataStreamRequestHeader
  private WriteOption[] options;

The options field above currently is an array so that it causes EI_EXPOSE_REP.

The problem is that the getWriteOptions() method below in DataStreamRequest returns an array. We probably should deprecate it and add a new method to return a List.

  //DataStreamRequest
  WriteOption[] getWriteOptions();