SCOAP3 workflows: improvements

[ErnestaP]

• [ ] Rename file to file_content in trigger_file_processing

• [ ] trigger_file_processing_DAG for Hindawi and APS

  def trigger_file_processing_DAG(ids_and_articles, publisher):
  for data in ids_and_articles:
       if publisher == "APS":
            data["article"] = json.dumps(data["article"])
      trigger_dag.trigger_dag(
          dag_id=data["id"],
          conf={"record": data["article"]},
          replace_microseconds=False,
      )
  return records

  for this change we need to adapt split_xmls

• [ ] use providers instead of custom classes. For example, for s3 connection, docs:

  create_object = S3CreateObjectOperator(
  task_id="create_object",
  s3_bucket=bucket_name,
  s3_key=key,
  data=DATA,
  replace=True,
  )