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: I223d58649a21565678bd7ef78d955b30d3fd6d84
diff --git a/fault-monitor/operational-status-monitor.cpp b/fault-monitor/operational-status-monitor.cpp
index 1114463..26ee918 100644
--- a/fault-monitor/operational-status-monitor.cpp
+++ b/fault-monitor/operational-status-monitor.cpp
@@ -14,7 +14,7 @@
 namespace monitor
 {
 
-void Monitor::matchHandler(sdbusplus::message::message& msg)
+void Monitor::matchHandler(sdbusplus::message_t& msg)
 {
     // Get the ObjectPath of the `xyz.openbmc_project.Inventory.Manager`
     // service
@@ -72,7 +72,7 @@
                                            "xyz.openbmc_project.Association",
                                            "endpoints");
     }
-    catch (const sdbusplus::exception::exception& e)
+    catch (const sdbusplus::exception_t& e)
     {
         lg2::error(
             "Failed to get endpoints property, ERROR = {ERROR}, PATH = {PATH}",
@@ -98,7 +98,7 @@
             dBusHandler.setProperty(path, "xyz.openbmc_project.Led.Group",
                                     "Asserted", assertedValue);
         }
-        catch (const sdbusplus::exception::exception& e)
+        catch (const sdbusplus::exception_t& e)
         {
             lg2::error(
                 "Failed to set Asserted property, ERROR = {ERROR}, PATH = {PATH}",