code: def run_indel_caller(job, tumor_bam, normal_bam, univ_options, indel_options):
      
      job.fileStore.logToMaster('Running INDEL on %s' % univ_options['patient'])
      indel_file = job.fileStore.getLocalTempFile()
      output_file = job.fileStore.writeGlobalFile(indel_file)
      return output_file
docs: This module will run an indel caller on the DNA bams.  This module will be
      implemented in the future.
  
      This module corresponds to node 13 on the tree