[params][fix] Consistently ignore defaults in hasKey/hasKeyInGroup

This has been forgotten in bug fix commit 61c2158e

dumux/common/loggingparametertree.hh

@@ -83,7 +83,7 @@ public:
             return true;
 
         auto compoundKey = groupPrefix + "." + key;
-        if (params_.hasKey(compoundKey) || defaultParams_.hasKey(compoundKey))
+        if (params_.hasKey(compoundKey))
             return true;
 
         compoundKey = findKeyInGroup(params_, key, groupPrefix);