Add support for REDEFINES rules when processing files in-place

[yruslan]

Background

Currently, REDEFINE rules are ignored when files are processed in-place:

SparkCobolProcessor.builder
  .withCopybookContents(copybookContents)
  .withProcessingStrategy(CobolProcessingStrategy.ToVariableLength)
  .withRecordProcessor(processor)
  .option("record_format", "F")
  .option("redefine-rule:1", "G1 => in(ID, 1, null)")       // <---- This
  .option("redefine-rule:2", "G2 => ID = 2 || ID = null")
  .option("redefine-rule:3", "G3 => ID = 3 || ID = null")
  .load(listOfFiles)
  .save(outputPath)


override def processRecord(record: Array[Byte], ctx: CobolProcessorContext): Array[Byte] = {
   // When getFieldValueByName is used, the rules are not applied.
   val segmentId = ctx.copybook.getFieldValueByName(someField, record, 0).toString
   ...
}

Feature

Add support for REDEFINES rules when processing files in-place.

Example [Optional]

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Proposed Solution [Optional]

• Add method isFiedEnabled() to be used together with getFieldByName() and getPrimitiveField()
• (possibly) getFieldValueByName() should apply redefine rules