Refactor boost::urls usage in system collection handler

This is a simple refactor in handleComputerSystemCollection
to use boost::urls::format instead of the crow util function
appendUrlPieces.

Tested: Query the route with curl and check if it still responds
with a valid collection.

Change-Id: If9c5f6dc8672c00b94db296d5968f756598a05e7
Signed-off-by: Oliver Brewka <oliver.brewka@9elements.com>

Author: mox669

redfish-core/include/utils/systems_utils.hpp

@@ -87,10 +87,9 @@ inline void handleSystemCollectionMembers(
 
     for (const std::string& systemName : pathNames)
     {
-        boost::urls::url url("/redfish/v1/Systems");
-        crow::utility::appendUrlPieces(url, systemName);
         nlohmann::json::object_t member;
-        member["@odata.id"] = std::move(url);
+        member["@odata.id"] =
+            boost::urls::format("/redfish/v1/Systems/{}", systemName);
         membersArray.emplace_back(std::move(member));
     }
     asyncResp->res.jsonValue["Members@odata.count"] = membersArray.size();