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: I2284ffdeafce8f319fe6d00417954c6fc80a37d1
Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
diff --git a/whitelist-filter.cpp b/whitelist-filter.cpp
index c40261f..dfd2a19 100644
--- a/whitelist-filter.cpp
+++ b/whitelist-filter.cpp
@@ -37,7 +37,7 @@
     void postInit();
     void cacheRestrictedMode(const std::vector<std::string>& devices);
     void handleRestrictedModeChange(
-        sdbusplus::message::message& m,
+        sdbusplus::message_t& m,
         const std::map<std::string, size_t>& deviceList);
     ipmi::Cc filterMessage(ipmi::message::Request::ptr request);