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: Ie36d234f4580029a7832a0cd179f3bb78a1a403f
diff --git a/dbus/dbushelper.hpp b/dbus/dbushelper.hpp
index 3f3e688..f65784c 100644
--- a/dbus/dbushelper.hpp
+++ b/dbus/dbushelper.hpp
@@ -21,7 +21,7 @@
     static constexpr char availabilityIntf[] =
         "xyz.openbmc_project.State.Decorator.Availability";
 
-    explicit DbusHelper(sdbusplus::bus::bus bus) : _bus(std::move(bus))
+    explicit DbusHelper(sdbusplus::bus_t bus) : _bus(std::move(bus))
     {}
     ~DbusHelper() = default;
 
@@ -58,7 +58,7 @@
             auto valueResponseMsg = _bus.call(msg);
             valueResponseMsg.read(result);
         }
-        catch (const sdbusplus::exception::exception& ex)
+        catch (const sdbusplus::exception_t& ex)
         {
             log::log<log::level::ERR>("Get Property Failed",
                                       log::entry("WHAT=%s", ex.what()));
@@ -69,7 +69,7 @@
     }
 
   private:
-    sdbusplus::bus::bus _bus;
+    sdbusplus::bus_t _bus;
 };
 
 } // namespace pid_control