Allow mod-inventory to act as publisher/subscriber of events related to data-import process.
1. Based on data-import events described in matrix define which events will be published by mod-inventory modules and to which events it will be subscribed.
2. Define necessary EventDescriptors in a MessagingDescriptor file (see documentation) for events that the module publishes: "CREATED_INVENTORY_INSTANCE", "CREATED_HOLDINGS_RECORD", "CREATED_ITEM_RECORD", "UPDATED_INVENTORY_INSTANCE", "DATA_IMPORT_ERROR".
3. Define module's subscription on the event "CREATED_SRS_MARC_BIB_RECORD" in a MessagingDescriptor file.
4. Register module in pub-sub (see documentation).
mod-inventory is registered in mod-pubsub as publisher/subscriber of events related to operations on Instances, Holdings and Items.