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: Icb5f840d3fc92ba893a99efb4f5e12719416fc44
Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
diff --git a/oemhandler.cpp b/oemhandler.cpp
index dc9c9f2..cd500ee 100644
--- a/oemhandler.cpp
+++ b/oemhandler.cpp
@@ -189,7 +189,7 @@
  */
 int rebootBMC()
 {
-    sdbusplus::bus::bus bus{ipmid_get_sd_bus_connection()};
+    sdbusplus::bus_t bus{ipmid_get_sd_bus_connection()};
     auto service = getService(bus, stateBmcPath, stateBmcIntf);
     if (service.empty())
     {