JPA should allow for a bean validator factory per persistence unit or per application deployment

Currently, a new bean validator factory instance is associated with each deployed persistence unit. This jira calls for adding a new PU property that specifies that a 'per app bean validator factory' should be used for a persistence unit (via a persistence unit property).

This can be controlled by a new persistence unit property (see existing ones here).

The new property can be something like "org.jboss.as.jpa.shareValidatorFactory" which defaults to false.

Look at org.jboss.as.jpa.processor.PersistenceUnitDeploymentProcessor.deployPersistenceUnit() to make this change.