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: I768b8efcac262ef07cf75f06486c6144c090e91a
diff --git a/main.cpp b/main.cpp
index da4d05a..1551aa6 100644
--- a/main.cpp
+++ b/main.cpp
@@ -24,7 +24,7 @@
 {
     auto bus = sdbusplus::bus::new_default();
 
-    sdbusplus::server::manager::manager objManager(bus, LOGGING_PATH);
+    sdbusplus::server::manager_t objManager(bus, LOGGING_PATH);
 
     ibm::logging::Manager manager{bus};