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: I39c3e6e2952a119f5179e841084fc31648da3422
Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
diff --git a/platform-mc/test/sensor_manager_test.cpp b/platform-mc/test/sensor_manager_test.cpp
index 03cb7fd..9fe050b 100644
--- a/platform-mc/test/sensor_manager_test.cpp
+++ b/platform-mc/test/sensor_manager_test.cpp
@@ -42,7 +42,7 @@
     }
 
     PldmTransport* pldmTransport = nullptr;
-    sdbusplus::bus::bus& bus;
+    sdbusplus::bus_t& bus;
     sdeventplus::Event event;
     TestInstanceIdDb instanceIdDb;
     pldm::requester::Handler<pldm::requester::Request> reqHandler;