Implement endpoint to receive event about processed record

Motivation

To provide the mod-record-manager with the ability to receive event about processed record

Steps

• add subscription declaration on data import completion event type to MessagingDescriptor.json
• add registration of the module as a subscriber for the above type on enabling the module for a tenant
• implement endpoint to get data import completion event

Results

mod-record-manager can receive events about the successful completion of the data import process