To run this application:

1. Setup environment with Grails 3.2.9 and Java 8
2. Create the following Postgres databases:
   • g3_humans
   • g3_dogs
   • g3_base
3. Open grails-app/conf/application.yml and update dbUsername and dbPassword
4. Run the application
5. Check the tables in each database. You will see that the human, dog, and mammal tables appear in both the g3_humans and g3_dogs database. However, the Human domain class is only configured for the g3_humans database, and the Dog doman class is only configured for the g3_dogs database.