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

Change-Id: I47fca4c5cc35086034911f026c2c48d28136db5f
Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
diff --git a/libpldmresponder/test/libpldmresponder_bios_config_test.cpp b/libpldmresponder/test/libpldmresponder_bios_config_test.cpp
index d70a961..fcbb09f 100644
--- a/libpldmresponder/test/libpldmresponder_bios_config_test.cpp
+++ b/libpldmresponder/test/libpldmresponder_bios_config_test.cpp
@@ -83,8 +83,7 @@
     MockBiosSystemConfig(const pldm::utils::DBusHandler* dBusIntf) :
         pldm::responder::oem_bios::Handler(dBusIntf)
     {}
-    MOCK_METHOD(void, ibmCompatibleAddedCallback,
-                (sdbusplus::message::message&), ());
+    MOCK_METHOD(void, ibmCompatibleAddedCallback, (sdbusplus::message_t&), ());
     MOCK_METHOD(std::optional<std::string>, getPlatformName, ());
 };