Those 2 classes:
 - Anthentication
 - SslStore 
are used in 2 modules :
 - designer/com.indy.addons.elasticsearch: for reverse
 - runtime/com.stambia.elasticsearch.7.x: for mapping execution
 
 ES7 is deprecated and will be removed when ES9 is release
(no date yet on 2024/05).
 
So when ES7 will be removed, those 2 classes can be moved in the designer project
(and this project can be deleted if empty).