Add ObjectManager in the right place

Per
https://gerrit.openbmc.org/c/openbmc/phosphor-dbus-interfaces/+/55308
dbus-sensors has been putting the ObjectManager in the wrong place.  Fix
that.

Tested:
Loaded build with all patches under this same topic, and observed IPMI
and Redfish trees working correctly and responding with sensor data.

Signed-off-by: Ed Tanous <edtanous@google.com>
Change-Id: Iefe050fe50658de6e1f215eab95b1f772e50eb4a
diff --git a/src/ADCSensorMain.cpp b/src/ADCSensorMain.cpp
index d174f64..0db56a9 100644
--- a/src/ADCSensorMain.cpp
+++ b/src/ADCSensorMain.cpp
@@ -299,8 +299,10 @@
 {
     boost::asio::io_service io;
     auto systemBus = std::make_shared<sdbusplus::asio::connection>(io);
+    sdbusplus::asio::object_server objectServer(systemBus, true);
+    objectServer.add_manager("/xyz/openbmc_project/sensors");
+
     systemBus->request_name("xyz.openbmc_project.ADCSensor");
-    sdbusplus::asio::object_server objectServer(systemBus);
     boost::container::flat_map<std::string, std::shared_ptr<ADCSensor>> sensors;
     auto sensorsChanged =
         std::make_shared<boost::container::flat_set<std::string>>();