Add support for websockets

src/main/java/ca/uhn/fhir/jpa/starter/FhirServerConfigDstu3.java

@@ -35,7 +35,7 @@ public class FhirServerConfigDstu3 extends BaseJavaConfigDstu3 {
     @Bean()
     public LocalContainerEntityManagerFactoryBean entityManagerFactory() {
         LocalContainerEntityManagerFactoryBean retVal = super.entityManagerFactory();
-        retVal.setPersistenceUnitName(HapiProperties.getPersistenceUnitName());
+        retVal.setPersistenceUnitName("HAPI_PU");
 
         try {
             retVal.setDataSource(myDataSource);