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_status.cpp b/occ_status.cpp
index 14981c7..57c8057 100644
--- a/occ_status.cpp
+++ b/occ_status.cpp
@@ -172,7 +172,7 @@
 
 // Handler called by Host control command handler to convey the
 // status of the executed command
-void Status::hostControlEvent(sdbusplus::message::message& msg)
+void Status::hostControlEvent(sdbusplus::message_t& msg)
 {
     std::string cmdCompleted{};
     std::string cmdStatus{};