Dynamicaly define the payload of Data Import events depending on MARC Record type (Bib, Authority, Holding)

Purpose/Overview:

SRM contains class which is used by service to publish record events: RecordsPublishingServiceImpl. This class prepares event payload in the following way:

HashMap<String, String> dataImportEventPayloadContext = new HashMap<>();
dataImportEventPayloadContext.put(MARC_BIBLIOGRAPHIC.value(), Json.encode(record));
dataImportEventPayloadContext.put("MAPPING_RULES", mappingRules.encode());
dataImportEventPayloadContext.put("MAPPING_PARAMS", Json.encode(mappingParameters));

The above has to be refactored to hide the details of context population behind a general interface. Each implementation of the interface should customize the content of the context depending on the MARC type (Bib, Authority, Holdings)

Requirements/Scope:

1. Data import event payload populated depending on MARC type of the record
2. For MARC Authority records the content should only contain the record itself mapped to "MARC_AUTHORITY" key. No mapping rules / parameters required

Acceptance criteria:

• MARC Bib record's payload is not changed
• MARC Auth record's payload contains only the record
• The content is validated with tests

Related Spike's page: Spike: MODDATAIMP-361 Investigation: Import MARC Authority records