grouperInstaller grouper.hibernate.properties cache factory_class configuration problem

Upgrading from Grouper 2.1.5 to 2.3.0. The grouperInstaller.jar took the attached grouper.hibernate.properties file and evolved it but it put in the evolved version the line

hibernate.cache.region.factory_class = net.sf.ehcache.hibernate.EhCacheRegionFactory

That line when not removed causes during the upgrade process this stack trace:

016-06-23 17:03:33,356: [main] ERROR Hib3DAO.initHibernateIfNotInitted(236) - - unable to initialize hibernate: Unable to create requested service [org.hibernate.cache.spi.RegionFactory]
org.hibernate.service.spi.ServiceException: Unable to create requested service [org.hibernate.cache.spi.RegionFactory]
at org.hibernate.service.internal.AbstractServiceRegistryImpl.createService(AbstractServiceRegistryImpl.java:244)
at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:208)
at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:189)
at org.hibernate.boot.internal.MetadataBuilderImpl$MetadataBuildingOptionsImpl.<init>(MetadataBuilderImpl.java:663)
at org.hibernate.boot.internal.MetadataBuilderImpl.<init>(MetadataBuilderImpl.java:127)
at org.hibernate.boot.MetadataSources.getMetadataBuilder(MetadataSources.java:135)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:655)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:724)
at edu.internet2.middleware.grouper.internal.dao.hib3.Hib3DAO.initHibernateIfNotInitted(Hib3DAO.java:223)
at edu.internet2.middleware.grouper.misc.GrouperStartup.startup(GrouperStartup.java:263)
at edu.internet2.middleware.grouper.registry.RegistryInitializeSchema.main(RegistryInitializeSchema.java:162)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at edu.internet2.middleware.grouper.app.gsh.GrouperShell.handleSpecialCase(GrouperShell.java:204)
at edu.internet2.middleware.grouper.app.gsh.GrouperShell.main(GrouperShell.java:144)
at edu.internet2.middleware.grouper.app.gsh.GrouperShellWrapper.main(GrouperShellWrapper.java:31)
Caused by: org.hibernate.HibernateException: could not instantiate RegionFactory [net.sf.ehcache.hibernate.EhCacheRegionFactory]
at org.hibernate.cache.internal.RegionFactoryInitiator.initiateService(RegionFactoryInitiator.java:84)
at org.hibernate.cache.internal.RegionFactoryInitiator.initiateService(RegionFactoryInitiator.java:29)
at org.hibernate.boot.registry.internal.StandardServiceRegistryImpl.initiateService(StandardServiceRegistryImpl.java:88)
at org.hibernate.service.internal.AbstractServiceRegistryImpl.createService(AbstractServiceRegistryImpl.java:234)
... 17 more
Caused by: org.hibernate.boot.registry.selector.spi.StrategySelectionException: Unable to resolve name [net.sf.ehcache.hibernate.EhCacheRegionFactory] as strategy [org.hibernate.cache.spi.RegionFactory]
at org.hibernate.boot.registry.selector.internal.StrategySelectorImpl.selectStrategyImplementor(StrategySelectorImpl.java:113)
at org.hibernate.cache.internal.RegionFactoryInitiator.initiateService(RegionFactoryInitiator.java:71)
... 20 more