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: I32e5f22829c03325295b180504ab5e3b5745dc95
Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
diff --git a/inc/button_handler.hpp b/inc/button_handler.hpp
index 819a433..1f74f18 100644
--- a/inc/button_handler.hpp
+++ b/inc/button_handler.hpp
@@ -91,7 +91,7 @@
      * @param[in] msg - sdbusplus message from signal
      */
 
-    void debugHostSelectorReleased(sdbusplus::message::message& msg);
+    void debugHostSelectorReleased(sdbusplus::message_t& msg);
 
     /**
      * @brief Checks if system is powered on