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: I8e2242adb79be342562c9b7f3d2153dfdf578085
diff --git a/pldmd/dbus_impl_requester.hpp b/pldmd/dbus_impl_requester.hpp
index e5c08af..a1dfcf5 100644
--- a/pldmd/dbus_impl_requester.hpp
+++ b/pldmd/dbus_impl_requester.hpp
@@ -13,7 +13,7 @@
 namespace dbus_api
 {
 
-using RequesterIntf = sdbusplus::server::object::object<
+using RequesterIntf = sdbusplus::server::object_t<
     sdbusplus::xyz::openbmc_project::PLDM::server::Requester>;
 
 /** @class Requester
@@ -35,7 +35,7 @@
      *  @param[in] bus - Bus to attach to.
      *  @param[in] path - Path to attach at.
      */
-    Requester(sdbusplus::bus::bus& bus, const std::string& path) :
+    Requester(sdbusplus::bus_t& bus, const std::string& path) :
         RequesterIntf(bus, path.c_str()){};
 
     /** @brief Implementation for RequesterIntf.GetInstanceId */