To better handle multi-journal, it's best to add several field to the "source" section 

Which use case/requirement will be addressed by the proposed feature?

IBMi allows to assign different journals to multiple tables under the same schema. That's why adding several fields under debezium "source" block is required to correctly order events accross a database.

Additionaly, this can provide useful data under a standard mono-journal use case

Here are the fields :

• Journal's receiver file name
• Journal's receiver library
• Journal's entry timestamp
• Journal's sequence number

Implementation ideas (optional)

a PR will be added soon with changes to classes  As400SourceInfoStructMaker, As400OffsetContext and SourceInfo