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: I29672cb229bd07022b00f52105ac1d50ecacca62
diff --git a/util.cpp b/util.cpp
index 9a43a50..28f59aa 100644
--- a/util.cpp
+++ b/util.cpp
@@ -12,7 +12,7 @@
 {
 using namespace phosphor::logging;
 
-std::string getService(sdbusplus::bus::bus& bus, const std::string& objectPath,
+std::string getService(sdbusplus::bus_t& bus, const std::string& objectPath,
                        const std::string& interface)
 {
     constexpr auto mapperBusBame = "xyz.openbmc_project.ObjectMapper";
@@ -27,7 +27,7 @@
         auto reply = bus.call(method);
         reply.read(response);
     }
-    catch (const sdbusplus::exception::exception& e)
+    catch (const sdbusplus::exception_t& e)
     {
         log<level::ERR>(fmt::format("D-Bus call exception OBJPATH={}"
                                     "INTERFACE={}  EXCEPTION={}",