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/phosphor-power-supply/psu_manager.hpp b/phosphor-power-supply/psu_manager.hpp
index 6f58eec..4b4171a 100644
--- a/phosphor-power-supply/psu_manager.hpp
+++ b/phosphor-power-supply/psu_manager.hpp
@@ -41,7 +41,7 @@
 class PowerSystemInputs : public PowerSystemInputsObject
 {
   public:
-    PowerSystemInputs(sdbusplus::bus::bus& bus, const std::string& path) :
+    PowerSystemInputs(sdbusplus::bus_t& bus, const std::string& path) :
         PowerSystemInputsObject(bus, path.c_str())
     {}
 };
@@ -68,7 +68,7 @@
      * @param[in] bus - D-Bus bus object
      * @param[in] e - event object
      */
-    PSUManager(sdbusplus::bus::bus& bus, const sdeventplus::Event& e);
+    PSUManager(sdbusplus::bus_t& bus, const sdeventplus::Event& e);
 
     /**
      * Get PSU properties from D-Bus, use that to build a power supply
@@ -138,7 +138,7 @@
     /**
      * The D-Bus object
      */
-    sdbusplus::bus::bus& bus;
+    sdbusplus::bus_t& bus;
 
     /**
      * The timer that runs to periodically check the power supplies.
@@ -207,7 +207,7 @@
      *
      * @param[in] msg - Data associated with the power state signal
      */
-    void powerStateChanged(sdbusplus::message::message& msg);
+    void powerStateChanged(sdbusplus::message_t& msg);
 
     /**
      * @brief Callback for inventory property changes
@@ -216,7 +216,7 @@
      *
      * @param[in]  msg - Data associated with the Present change signal
      **/
-    void presenceChanged(sdbusplus::message::message& msg);
+    void presenceChanged(sdbusplus::message_t& msg);
 
     /**
      * @brief Callback for entity-manager interface added
@@ -226,7 +226,7 @@
      *
      * @param[in] msg - Data associated with the interfaces added signal
      */
-    void entityManagerIfaceAdded(sdbusplus::message::message& msg);
+    void entityManagerIfaceAdded(sdbusplus::message_t& msg);
 
     /**
      * @brief Adds properties to the inventory.