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: Ief05bd757cffb1453e058a719ee4b060861752e7
diff --git a/power-sequencer/runtime_monitor.cpp b/power-sequencer/runtime_monitor.cpp
index 01c3e4c..487a2a6 100644
--- a/power-sequencer/runtime_monitor.cpp
+++ b/power-sequencer/runtime_monitor.cpp
@@ -40,7 +40,7 @@
 #endif
 }
 
-void RuntimeMonitor::onPowerLost(sdbusplus::message::message&)
+void RuntimeMonitor::onPowerLost(sdbusplus::message_t&)
 {
     log<level::INFO>("PGOOD failure detected.  Checking for faults.");