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.hpp b/occ_pass_through.hpp
index 52a8f71..f11695c 100644
--- a/occ_pass_through.hpp
+++ b/occ_pass_through.hpp
@@ -18,7 +18,7 @@
 namespace occ
 {
 
-using Iface = sdbusplus::server::object::object<
+using Iface = sdbusplus::server::object_t<
     sdbusplus::org::open_power::OCC::server::PassThrough>;
 
 // For waiting on signals
@@ -107,7 +107,7 @@
      *
      *  @param[in]  msg - Data associated with subscribed signal
      */
-    void activeStatusEvent(sdbusplus::message::message& msg);
+    void activeStatusEvent(sdbusplus::message_t& msg);
 };
 
 } // namespace occ