Simplify configuration

persistence/test/DataSources.kt

@@ -7,7 +7,6 @@ class KMariadbContainer : MariaDBContainer<KMariadbContainer>("mariadb:10.5.5")
 
 fun h2dataSourceConfig() = DataSourceConfig(
     jdbcUrl = "jdbc:h2:mem:regular;DB_CLOSE_DELAY=-1;",
-    driverClassName = "org.h2.Driver",
     username = "h2",
     password = "",
     maximumPoolSize = 2,
@@ -16,7 +15,6 @@ fun h2dataSourceConfig() = DataSourceConfig(
 
 fun mariadbDataSourceConfig(jdbcUrl: String) = DataSourceConfig(
     jdbcUrl = jdbcUrl,
-    driverClassName = "org.mariadb.jdbc.Driver",
     username = "test",
     password = "test",
     maximumPoolSize = 2,