Remove unnecessary copy constructing ObjectManager

Change-Id: Id78b31e981e2e483789d6186848e21db20689f1a
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/manager.cpp b/manager.cpp
index 0c278ab..ffde98e 100644
--- a/manager.cpp
+++ b/manager.cpp
@@ -65,7 +65,7 @@
     _shutdown(false),
     _root(root),
     _bus(std::move(bus)),
-    _manager(sdbusplus::server::manager::manager(_bus, root))
+    _manager(_bus, root)
 {
     for (auto& group : _events)
     {