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: I9541d521bf67882215a4a66dce020e38ac2df065
diff --git a/occ_pass_through.cpp b/occ_pass_through.cpp
index 6291828..afc9513 100644
--- a/occ_pass_through.cpp
+++ b/occ_pass_through.cpp
@@ -166,7 +166,7 @@
 }
 
 // Called at OCC Status change signal
-void PassThrough::activeStatusEvent(sdbusplus::message::message& msg)
+void PassThrough::activeStatusEvent(sdbusplus::message_t& msg)
 {
     std::string statusInterface;
     std::map<std::string, std::variant<bool>> msgData;