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: Ibd2a0b512bfb7caf65bfab64b271d194da520aac
diff --git a/globalhandler.cpp b/globalhandler.cpp
index 2561e08..4012ce0 100644
--- a/globalhandler.cpp
+++ b/globalhandler.cpp
@@ -20,7 +20,7 @@
 
 void resetBMC()
 {
-    sdbusplus::bus::bus bus{ipmid_get_sd_bus_connection()};
+    sdbusplus::bus_t bus{ipmid_get_sd_bus_connection()};
 
     auto bmcStateObj =
         ipmi::getDbusObject(bus, bmcStateIntf, bmcStateRoot, match);