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: I8e2242adb79be342562c9b7f3d2153dfdf578085
diff --git a/oem/ibm/libpldmresponder/platform_oem_ibm.cpp b/oem/ibm/libpldmresponder/platform_oem_ibm.cpp
index 73e6c85..7639e54 100644
--- a/oem/ibm/libpldmresponder/platform_oem_ibm.cpp
+++ b/oem/ibm/libpldmresponder/platform_oem_ibm.cpp
@@ -42,7 +42,7 @@
             return PLDM_SUCCESS;
         }
     }
-    catch (const sdbusplus::exception::exception& e)
+    catch (const sdbusplus::exception_t& e)
     {
         std::cerr << "Error in getting current host state, continue ... \n";
     }