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: If9a7314dade153dd7dbd149a76352aca8257839d
diff --git a/ubi/item_updater_ubi.hpp b/ubi/item_updater_ubi.hpp
index ccd8e57..f462bdf 100644
--- a/ubi/item_updater_ubi.hpp
+++ b/ubi/item_updater_ubi.hpp
@@ -30,7 +30,7 @@
 class ItemUpdaterUbi : public ItemUpdater
 {
   public:
-    ItemUpdaterUbi(sdbusplus::bus::bus& bus, const std::string& path) :
+    ItemUpdaterUbi(sdbusplus::bus_t& bus, const std::string& path) :
         ItemUpdater(bus, path)
     {
         processPNORImage();