It looks like this fix caused a failure in an EAP JPA test:
org.jboss.as.test.integration.jpa.cfgfile.CfgFileTestCase

That test uses a persistence.xml containing just the following property:
<property name="hibernate.ejb.cfgfile" value="hibernate.cfg.xml"/>

hibernate.cfg.xml contains the properties that are needed for the test.

When the test calls EntityManager.getEntityManagerFactory().getProperties(), null is returned, causing an NPE when the test checks the value of a property defined in hibernate.cfg.xml,