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.hpp b/occ_status.hpp
index 224a534..ce3df77 100644
--- a/occ_status.hpp
+++ b/occ_status.hpp
@@ -27,7 +27,7 @@
 
 class Manager;
 namespace Base = sdbusplus::org::open_power::OCC::server;
-using Interface = sdbusplus::server::object::object<Base::Status>;
+using Interface = sdbusplus::server::object_t<Base::Status>;
 
 // IPMID's host control application
 namespace Control = sdbusplus::org::open_power::Control::server;
@@ -295,7 +295,7 @@
      *
      *  @param[in]  msg - Data associated with subscribed signal
      */
-    void hostControlEvent(sdbusplus::message::message& msg);
+    void hostControlEvent(sdbusplus::message_t& msg);
 
     /** @brief Sends a message to host control command handler to reset OCC
      */