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/phosphor-regulators/src/presence_service.cpp b/phosphor-regulators/src/presence_service.cpp
index 61d8aec..017bc7a 100644
--- a/phosphor-regulators/src/presence_service.cpp
+++ b/phosphor-regulators/src/presence_service.cpp
@@ -41,7 +41,7 @@
             util::getProperty(INVENTORY_IFACE, PRESENT_PROP, inventoryPath,
                               INVENTORY_MGR_IFACE, bus, present);
         }
-        catch (const sdbusplus::exception::exception& e)
+        catch (const sdbusplus::exception_t& e)
         {
             // If exception type is expected and indicates hardware not present
             if (isExpectedException(e))
@@ -62,8 +62,7 @@
     return present;
 }
 
-bool DBusPresenceService::isExpectedException(
-    const sdbusplus::exception::exception& e)
+bool DBusPresenceService::isExpectedException(const sdbusplus::exception_t& e)
 {
     // Initially assume exception is not one of the expected types
     bool isExpected{false};