Refactor GetSubTreePaths method

Since the GetSubTreePaths method has been implemented in dbus_utility
and this commit is to integrate all the places where the
GetSubTreePaths method is called, and use the method in dbus_utility
uniformly.

Requires https://gerrit.openbmc.org/c/openbmc/sdbusplus/+/60020 to
build.

Tested: Redfish Validator Passed

Signed-off-by: George Liu <liuxiwei@inspur.com>
Change-Id: Ie4140d4484a7e4f4b943013f4371ffd2d44a22e9
diff --git a/include/openbmc_dbus_rest.hpp b/include/openbmc_dbus_rest.hpp
index 2cb2bc3..c7dbb27 100644
--- a/include/openbmc_dbus_rest.hpp
+++ b/include/openbmc_dbus_rest.hpp
@@ -13,6 +13,7 @@
 // limitations under the License.
 
 #pragma once
+#include "dbus_utility.hpp"
 #include "http_request.hpp"
 #include "http_response.hpp"
 #include "logging.hpp"
@@ -1640,9 +1641,10 @@
 inline void handleList(const std::shared_ptr<bmcweb::AsyncResp>& asyncResp,
                        const std::string& objectPath, int32_t depth = 0)
 {
-    crow::connections::systemBus->async_method_call(
+    dbus::utility::getSubTreePaths(
+        objectPath, depth, {},
         [asyncResp](
-            const boost::system::error_code ec,
+            const boost::system::error_code& ec,
             const dbus::utility::MapperGetSubTreePathsResponse& objectPaths) {
         if (ec)
         {
@@ -1656,11 +1658,7 @@
             asyncResp->res.jsonValue["message"] = "200 OK";
             asyncResp->res.jsonValue["data"] = objectPaths;
         }
-        },
-        "xyz.openbmc_project.ObjectMapper",
-        "/xyz/openbmc_project/object_mapper",
-        "xyz.openbmc_project.ObjectMapper", "GetSubTreePaths", objectPath,
-        depth, std::array<std::string, 0>());
+        });
 }
 
 inline void handleEnumerate(const std::shared_ptr<bmcweb::AsyncResp>& asyncResp,