Add empty default match argument for getAllDbusObjects

This is parallel to other functions defined in utils.hpp

Change-Id: I8f40e27d1a179258df5059c27066c8cd1b37a260
Signed-off-by: Vernon Mauery <vernon.mauery@intel.com>
diff --git a/utils.hpp b/utils.hpp
index 4c7b9a9..75a3252 100644
--- a/utils.hpp
+++ b/utils.hpp
@@ -183,7 +183,7 @@
 ObjectTree getAllDbusObjects(sdbusplus::bus::bus& bus,
                              const std::string& serviceRoot,
                              const std::string& interface,
-                             const std::string& match);
+                             const std::string& match = {});
 
 /** @brief Deletes all the dbus objects from the given service root
            which matches the object identifier.