sdbusplus: use shorter type aliases

The sdbusplus headers provide shortened aliases for many types.
Switch to using them to provide better code clarity and shorter
lines.  Possible replacements are for:
  * bus_t
  * exception_t
  * manager_t
  * match_t
  * message_t
  * object_t
  * slot_t

Change-Id: I4af62f309f4cd3bb51759fa18de2448235e557fe
Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
diff --git a/redfish-core/lib/ethernet.hpp b/redfish-core/lib/ethernet.hpp
index 804d8aa..e05cb6b 100644
--- a/redfish-core/lib/ethernet.hpp
+++ b/redfish-core/lib/ethernet.hpp
@@ -1040,7 +1040,7 @@
 
     crow::connections::systemBus->async_method_call(
         [asyncResp, macAddress](const boost::system::error_code ec,
-                                const sdbusplus::message::message& msg) {
+                                const sdbusplus::message_t& msg) {
         if (ec)
         {
             const sd_bus_error* err = msg.get_error();