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: I7ae6214461bdf45c1a21fb702cc8bf5578d827c6
diff --git a/dump_manager_main.cpp b/dump_manager_main.cpp
index 55f4812..402cea3 100644
--- a/dump_manager_main.cpp
+++ b/dump_manager_main.cpp
@@ -65,7 +65,7 @@
     }
 
     // Add sdbusplus ObjectManager for the 'root' path of the DUMP manager.
-    sdbusplus::server::manager::manager objManager(bus, DUMP_OBJPATH);
+    sdbusplus::server::manager_t objManager(bus, DUMP_OBJPATH);
 
     try
     {