Make propertyValueFormatError more typesafe

Similar to other patches, make propertyValueFormatError accept a
nlohmann::json object, which removes a lot of the unsafe dump code that
we have littered about.

Tested: No easy to replicate error.  Code is identical to previous
patchsets.  Inspection and code compilation only.

Signed-off-by: Ed Tanous <edtanous@google.com>
Change-Id: Ic9d0f196b6e198073189f744b738db7ffa2f1b74
diff --git a/redfish-core/lib/event_service.hpp b/redfish-core/lib/event_service.hpp
index 02bb21f..28a7ac6 100644
--- a/redfish-core/lib/event_service.hpp
+++ b/redfish-core/lib/event_service.hpp
@@ -375,7 +375,7 @@
                     if (value == nullptr)
                     {
                         messages::propertyValueFormatError(
-                            asyncResp->res, item.value().dump(2, 1),
+                            asyncResp->res, item.value(),
                             "HttpHeaders/" + item.key());
                         return;
                     }
@@ -614,7 +614,7 @@
                     if (value == nullptr)
                     {
                         messages::propertyValueFormatError(
-                            asyncResp->res, it.value().dump(2, ' ', true),
+                            asyncResp->res, it.value(),
                             "HttpHeaders/" + it.key());
                         return;
                     }