* Bring Spring Data MongoDb back to `2.3`;
essentially rely on Spring Data BOM for dependencies
* Change `mongodb-driver-reactivestreams` driver version back to `1.12.0`
* Upgrade to Spring Security 5.3 M1
* Fix MongoDb module to use `MongoDbFactory` class instead of new (not committed yet)
`MongoDatabaseFactory`
* Remove `uuidRepresentation()` configuration from the `MongoClients` factory usage -
that is going to be MongoDb driver 4 feature