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: I5763a3249f5c8baba800cf5886cb0df4d6b21e58
diff --git a/include/sensorutils.hpp b/include/sensorutils.hpp
index e404a21..5e88dc4 100644
--- a/include/sensorutils.hpp
+++ b/include/sensorutils.hpp
@@ -76,7 +76,7 @@
         sd_bus_unref(bus);
         return false;
     }
-    sdbusplus::bus::bus dbus(bus);
+    sdbusplus::bus_t dbus(bus);
     auto mapperCall =
         dbus.new_method_call("xyz.openbmc_project.ObjectMapper",
                              "/xyz/openbmc_project/object_mapper",