Merge pull request wildfly#6279 from jamezp/WFCORE-7089

[WFCORE-7089] When setting a policy in the PolicyDefinitions do not a…

Author: yersan

elytron/src/main/java/org/wildfly/extension/elytron/PolicyDefinitions.java

@@ -199,7 +199,9 @@ public Policy getValue() throws IllegalStateException, IllegalArgumentException
                     }
 
                     private void setPolicy(Policy policy) {
-                        policy.refresh();
+                        if (policy != null) {
+                            policy.refresh();
+                        }
                         try {
                             if (WildFlySecurityManager.isChecking()) {
                                 AccessController.doPrivileged(setPolicyAction(policy));