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

Change-Id: Ib0d2666217b7fd0e3621e16557dd44ae0c35598a
Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
diff --git a/src/mdrv2.cpp b/src/mdrv2.cpp
index 173b34f..e71d922 100644
--- a/src/mdrv2.cpp
+++ b/src/mdrv2.cpp
@@ -420,8 +420,7 @@
                             sdbusplus::bus::match::rules::argNpath(
                                 0,
                                 "/xyz/openbmc_project/inventory/system/board/"),
-                        [this,
-                         systemInterface](sdbusplus::message::message& msg) {
+                        [this, systemInterface](sdbusplus::message_t& msg) {
                             sdbusplus::message::object_path objectName;
                             boost::container::flat_map<
                                 std::string,