Running the rdbms Application we get:
Caused by: java.lang.IllegalArgumentException: jdbcUrl is required with driverClassName. at com.zaxxer.hikari.HikariConfig.validate(HikariConfig.java:951) ~[HikariCP-3.2.0.jar:na] at com.zaxxer.hikari.HikariDataSource.getConnection(HikariDataSource.java:109) ~[HikariCP-3.2.0.jar:na] at org.springframework.jdbc.datasource.DataSourceUtils.fetchConnection(DataSourceUtils.java:157) ~[spring-jdbc-5.1.8.RELEASE.jar:5.1.8.RELEASE] at org.springframework.jdbc.datasource.DataSourceUtils.doGetConnection(DataSourceUtils.java:115) ~[spring-jdbc-5.1.8.RELEASE.jar:5.1.8.RELEASE] at org.springframework.jdbc.datasource.DataSourceUtils.getConnection(DataSourceUtils.java:78) ~[spring-jdbc-5.1.8.RELEASE.jar:5.1.8.RELEASE] at org.springframework.jdbc.datasource.init.DatabasePopulatorUtils.execute(DatabasePopulatorUtils.java:46) ~[spring-jdbc-5.1.8.RELEASE.jar:5.1.8.RELEASE] ... 46 common frames omitted
Just needs a property change.