Rejected because the problem as Steve Ebersole commented in https://hibernate.atlassian.net/browse/HHH-9714is that MySQL/MariaDB do not support schemas and to obtain the correct behaviour the solution is to use

hibernate.default_catalog 

instead of

hibernate.default_schema

and to change the

 @Table(schema= 

with

 @Table(catalog= 

.
If you want

hbm2ddl.auto=create

to create also the catalog just add to the configuration

hibernate.hbm2dll.create_namespaces=true