Fix a bug in optional json parsing

A small logic error caused bugs in the required-ness of optional params.
In the error case, a bad_request return code would be returned with no
error message.  This commit allows the request to suceed unharmed.

Change-Id: I1c1cbaf08e79bc1f52485ae12d73701d74e0e2aa
Signed-off-by: Ed Tanous <ed.tanous@intel.com>
diff --git a/redfish-core/include/utils/json_utils.hpp b/redfish-core/include/utils/json_utils.hpp
index b8195c4..f02fc67 100644
--- a/redfish-core/include/utils/json_utils.hpp
+++ b/redfish-core/include/utils/json_utils.hpp
@@ -140,12 +140,8 @@
             item.key(), item.value(), res, handled, key, in...);
     }
 
-    if (!handled.all())
-    {
-        details::handleMissing(handled, res, key, in...);
+    details::handleMissing(handled, res, key, in...);
 
-        return false;
-    }
     return res.result() == boost::beast::http::status::ok;
 }