Make it easier to override clone in subclasses

created the cloned object using the class of the sourced object to allow
classes that extend RegisteredServiceImpl to only need to track their
own attributes in the clone method

cas-server-core/src/main/java/org/jasig/cas/services/RegisteredServiceImpl.java

@@ -219,7 +219,12 @@ public int getEvaluationOrder() {
     }
 
     public Object clone() throws CloneNotSupportedException {
-        final RegisteredServiceImpl registeredServiceImpl = new RegisteredServiceImpl();
+        final RegisteredServiceImpl registeredServiceImpl;
+        try {
+            registeredServiceImpl = this.getClass().newInstance();
+        } catch (final Exception e) {
+            throw new CloneNotSupportedException("error creating new object");
+        }
 
         registeredServiceImpl.setAllowedAttributes(this.allowedAttributes);
         registeredServiceImpl.setAllowedToProxy(this.allowedToProxy);