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: I29672cb229bd07022b00f52105ac1d50ecacca62
diff --git a/nmi_interface.hpp b/nmi_interface.hpp
index ef871b8..3835c61 100644
--- a/nmi_interface.hpp
+++ b/nmi_interface.hpp
@@ -10,7 +10,7 @@
 {
 
 using Base = sdbusplus::xyz::openbmc_project::Control::Host::server::NMI;
-using Interface = sdbusplus::server::object::object<Base>;
+using Interface = sdbusplus::server::object_t<Base>;
 
 /*  @class NMI
  *  @brief Implementation of NMI (Soft Reset)
@@ -29,7 +29,7 @@
      *  @param[in] bus - sdbusplus D-Bus to attach to.
      *  @param[in] path - Path to attach to.
      */
-    NMI(sdbusplus::bus::bus& bus, const char* path);
+    NMI(sdbusplus::bus_t& bus, const char* path);
 
     /*  @brief trigger stop followed by soft reset.
      */
@@ -37,7 +37,7 @@
 
   private:
     /** @brief sdbus handle */
-    sdbusplus::bus::bus& bus;
+    sdbusplus::bus_t& bus;
 
     /** @brief object path */
     std::string objectPath;