Treat entity as Patient if absent for pre-configured PDQ Service Desc…

…riptors in LDAP #1732

dcm4chee-arc-conf/src/main/java/org/dcm4chee/arc/conf/PDQServiceDescriptor.java

@@ -58,7 +58,7 @@ public class PDQServiceDescriptor {
     private int[] selection = {};
     private final Map<String, String> properties = new HashMap<>();
     private String defaultCharacterSet;
-    private Entity entity;
+    private Entity entity = Entity.Patient;
 
     public PDQServiceDescriptor() {
     }