Configurability enhancements for duality view builder component

[anders-swanson]

Update the configuration of the duality view builder component to account for existing schemas not managed by JPA:

1. Make the duality view builder a @bean so Spring Boot apps can override it with @primary. Currently it is a final @component
2. If JPA ddl-auto settings are present, use those
3. If custom DV ddl-auto settings are present (which must be introduced as a configuration properties), use this over JPA ddl-auto