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: I96286490697ce5d7fecc1c9c358f5f1d054137ec
diff --git a/ubi/item_updater_helper.cpp b/ubi/item_updater_helper.cpp
index acb73a0..ae00ea5 100644
--- a/ubi/item_updater_helper.cpp
+++ b/ubi/item_updater_helper.cpp
@@ -74,7 +74,7 @@
     {
         bus.call_noreply(method);
     }
-    catch (const sdbusplus::exception::exception& e)
+    catch (const sdbusplus::exception_t& e)
     {
         error("Failed to update u-boot env variables: {FLASHID}", "FLASHID",
               flashId);
@@ -92,7 +92,7 @@
     {
         bus.call_noreply(method);
     }
-    catch (const sdbusplus::exception::exception& e)
+    catch (const sdbusplus::exception_t& e)
     {
         error("Failed to copy U-Boot to alternate chip: {ERROR}", "ERROR", e);
     }