See
https://github.com/kiegroup/droolsjbpm-integration/pull/1864/commits/2331c1efec7bfde5e48d91a2b54200f397e39d09

The Price class was moved from a static inner class because it was causing a JAXB problem in OptaPlannerIntegrationTest that crashed while trying to serialize DomainClassMetadata (due to the creation of the synthetic class CloudBalancingGenerator$1

Customers are still relying on static inner class so we should have this test running in the original form

run the test with

mvn -nsu -Dcontainer=wildfly -Dintegration-tests=true -Dfull=true -Dcontainer.profile=wildfly -Pwildfly clean install