LOG INFO level message if the Hibernate second level cache is enabled

The idea is to log at INFO level if the Hibernate second level cache is to be enabled by org.jboss.as.jpa.hibernate5.service.WildFlyCustomRegionFactoryInitiator. Note that org.hibernate.cache.internal.RegionFactoryInitiator#resolveRegionFactory still needs to be able to create the second level cache.

Update WildFlyCustomRegionFactoryInitiator#resolveRegionFactory to log at INFO level the "WildFlyCustomRegionFactoryInitiator#resolveRegionFactory will create second level cache %s" message.

This message will only be logged during application deployment.