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: Ief05bd757cffb1453e058a719ee4b060861752e7
diff --git a/power-supply/power_supply.cpp b/power-supply/power_supply.cpp
index 548895d..ce6a43a 100644
--- a/power-supply/power_supply.cpp
+++ b/power-supply/power_supply.cpp
@@ -43,7 +43,7 @@
 
 PowerSupply::PowerSupply(const std::string& name, size_t inst,
                          const std::string& objpath, const std::string& invpath,
-                         sdbusplus::bus::bus& bus, const sdeventplus::Event& e,
+                         sdbusplus::bus_t& bus, const sdeventplus::Event& e,
                          std::chrono::seconds& t, std::chrono::seconds& p) :
     Device(name, inst),
     monitorPath(objpath), pmbusIntf(objpath),
@@ -175,7 +175,7 @@
     return;
 }
 
-void PowerSupply::inventoryChanged(sdbusplus::message::message& msg)
+void PowerSupply::inventoryChanged(sdbusplus::message_t& msg)
 {
     std::string msgSensor;
     std::map<std::string, std::variant<uint32_t, bool>> msgData;
@@ -211,7 +211,7 @@
                       bus, this->present);
 }
 
-void PowerSupply::powerStateChanged(sdbusplus::message::message& msg)
+void PowerSupply::powerStateChanged(sdbusplus::message_t& msg)
 {
     int32_t state = 0;
     std::string msgSensor;