Story ac2. Added code to check for null subject.

projects/cadcAccessControl-Server/src/ca/nrc/cadc/ac/server/web/users/GetUserAction.java

@@ -140,6 +140,8 @@ public class GetUserAction extends AbstractUserAction
     	boolean isServops = false;
         AccessControlContext acc = AccessController.getContext();
         Subject subject = Subject.getSubject(acc);
+        if (subject != null)
+        {
         	for (Principal principal : subject.getPrincipals())
         	{
         		if (principal.getName().equals(this.getAugmentUserDN()))
@@ -148,6 +150,7 @@ public class GetUserAction extends AbstractUserAction
         			break;
         		}
         	}
+        }
         
         return isServops;
     }