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

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I91502c85799b7d3be22b7d05659ff26bea08c32b
diff --git a/inc/power_button.hpp b/inc/power_button.hpp
index 73336ac..90076f3 100644
--- a/inc/power_button.hpp
+++ b/inc/power_button.hpp
@@ -33,14 +33,14 @@
 static constexpr std::string_view POWER_BUTTON = "POWER_BUTTON";
 
 class PowerButton :
-    public sdbusplus::server::object::object<
+    public sdbusplus::server::object_t<
         sdbusplus::xyz::openbmc_project::Chassis::Buttons::server::Power>,
     public ButtonIface
 {
   public:
-    PowerButton(sdbusplus::bus::bus& bus, const char* path, EventPtr& event,
+    PowerButton(sdbusplus::bus_t& bus, const char* path, EventPtr& event,
                 buttonConfig& buttonCfg) :
-        sdbusplus::server::object::object<
+        sdbusplus::server::object_t<
             sdbusplus::xyz::openbmc_project::Chassis::Buttons::server::Power>(
             bus, path),
         ButtonIface(bus, event, buttonCfg)