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: Ibc25db433a6926f7ee43ea83312c3ac14f480c33
diff --git a/extensions/openpower-pels/data_interface.cpp b/extensions/openpower-pels/data_interface.cpp
index f49bcca..4fa802f 100644
--- a/extensions/openpower-pels/data_interface.cpp
+++ b/extensions/openpower-pels/data_interface.cpp
@@ -121,7 +121,7 @@
     return {base, connector};
 }
 
-DataInterface::DataInterface(sdbusplus::bus::bus& bus) : _bus(bus)
+DataInterface::DataInterface(sdbusplus::bus_t& bus) : _bus(bus)
 {
     readBMCFWVersion();
     readServerFWVersion();
@@ -749,7 +749,7 @@
         _bus.call_noreply(method, hwIsolationTimeout);
     }
 
-    catch (const sdbusplus::exception::exception& e)
+    catch (const sdbusplus::exception_t& e)
     {
         std::string errName = e.name();
         // SD_BUS_ERROR_TIMEOUT error is expected, due to PEL api dependency