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: I17807e986cefa6a3d9e757c533ac373035438aed
diff --git a/include/rde/notifier_dbus_handler.hpp b/include/rde/notifier_dbus_handler.hpp
index efcbd86..e90fa71 100644
--- a/include/rde/notifier_dbus_handler.hpp
+++ b/include/rde/notifier_dbus_handler.hpp
@@ -21,7 +21,7 @@
      *
      * @param bus - bus to attache to.
      */
-    explicit CperFileNotifierHandler(sdbusplus::bus::bus& bus);
+    explicit CperFileNotifierHandler(sdbusplus::bus_t& bus);
 
     /**
      * @brief Create a DBus object with the provided filePath value.
@@ -31,8 +31,8 @@
     void createEntry(const std::string& filePath);
 
   private:
-    sdbusplus::bus::bus& bus;
-    sdbusplus::server::manager::manager objManager;
+    sdbusplus::bus_t& bus;
+    sdbusplus::server::manager_t objManager;
 
     /**
      * @brief A vector to keep track of DBus FilePath objects.