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: Ic68a12ef7c12222b1300981282161c971b561dc1
diff --git a/session.hpp b/session.hpp
index 69dbc3c..5ddf2f7 100644
--- a/session.hpp
+++ b/session.hpp
@@ -93,7 +93,7 @@
  * implementation support at least four simultaneous sessions
  */
 
-using SessionIface = sdbusplus::server::object::object<
+using SessionIface = sdbusplus::server::object_t<
     sdbusplus::xyz::openbmc_project::Ipmi::server::SessionInfo>;
 
 class Session : public SessionIface
@@ -115,7 +115,7 @@
      * @param[in] inRemoteConsoleSessID - Remote Console Session ID
      * @param[in] priv - Privilege Level requested in the Command
      */
-    Session(sdbusplus::bus::bus& bus, const char* path,
+    Session(sdbusplus::bus_t& bus, const char* path,
             SessionID inRemoteConsoleSessID, SessionID BMCSessionID,
             char priv) :
         SessionIface(bus, path)