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: I662faee19b7b289bc0a39665fc5ce9e19406f933
diff --git a/settings_manager.mako.hpp b/settings_manager.mako.hpp
index 186a6c2..6f14612 100644
--- a/settings_manager.mako.hpp
+++ b/settings_manager.mako.hpp
@@ -99,14 +99,14 @@
 <% aliases.append("Iface" + str(index)) %>\
 % endfor
 <%
-    parent = "sdbusplus::server::object::object" + "<" + ", ".join(aliases) + ">"
+    parent = "sdbusplus::server::object_t" + "<" + ", ".join(aliases) + ">"
 %>\
 using Parent = ${parent};
 
 class Impl : public Parent
 {
     public:
-        Impl(sdbusplus::bus::bus& bus, const char* path):
+        Impl(sdbusplus::bus_t& bus, const char* path):
             Parent(bus, path, Parent::action::defer_emit),
             path(path)
         {
@@ -272,7 +272,7 @@
         /** @brief Constructor to put settings objects on to the bus.
          *  @param[in] bus - Bus to attach to.
          */
-        explicit Manager(sdbusplus::bus::bus& bus) :
+        explicit Manager(sdbusplus::bus_t& bus) :
             settings(
                 std::make_tuple(
 % for index, path in enumerate(objects):