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/item_updater_main.cpp b/item_updater_main.cpp
index 556e03d..855aaf2 100644
--- a/item_updater_main.cpp
+++ b/item_updater_main.cpp
@@ -28,10 +28,9 @@
 {
 namespace updater
 {
-void initializeService(sdbusplus::bus::bus& bus)
+void initializeService(sdbusplus::bus_t& bus)
 {
-    static sdbusplus::server::manager::manager objManager(bus,
-                                                          SOFTWARE_OBJPATH);
+    static sdbusplus::server::manager_t objManager(bus, SOFTWARE_OBJPATH);
 #ifdef UBIFS_LAYOUT
     static ItemUpdaterUbi updater(bus, SOFTWARE_OBJPATH);
     static Watch watch(