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: I1621db436cb5e81ca597f5b9dac76452c6e7fd74
Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
diff --git a/include/user_role_map.hpp b/include/user_role_map.hpp
index ce2f97e..b574c4e 100644
--- a/include/user_role_map.hpp
+++ b/include/user_role_map.hpp
@@ -100,7 +100,7 @@
         return fields;
     }
 
-    void userAdded(sdbusplus::message::message& m)
+    void userAdded(sdbusplus::message_t& m)
     {
         BMCWEB_LOG_DEBUG("User Added");
         sdbusplus::message::object_path objPath;
@@ -136,7 +136,7 @@
         }
     }
 
-    void userRemoved(sdbusplus::message::message& m)
+    void userRemoved(sdbusplus::message_t& m)
     {
         BMCWEB_LOG_DEBUG("User Removed");
         sdbusplus::message::object_path objPath;
@@ -164,7 +164,7 @@
         roleMap.erase(name);
     }
 
-    void userPropertiesChanged(sdbusplus::message::message& m)
+    void userPropertiesChanged(sdbusplus::message_t& m)
     {
         BMCWEB_LOG_DEBUG("Properties Changed");
         std::string interface;