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: Ieb6587e32446a758676f67d9c868289cc02e50bf
diff --git a/tests/test_HwmonTempSensor.cpp b/tests/test_HwmonTempSensor.cpp
index 2be603a..dc354a8 100644
--- a/tests/test_HwmonTempSensor.cpp
+++ b/tests/test_HwmonTempSensor.cpp
@@ -9,8 +9,7 @@
 TEST(HwmonTempSensor, TestTMP75)
 {
     boost::asio::io_service io;
-    auto system_bus =
-        std::make_shared<dbus::connection>(io, dbus::bus::session);
+    auto system_bus = std::make_shared<dbus::connection>(io, dbus_t::session);
     dbus::DbusObjectServer object_server(system_bus);
 
     std::vector<thresholds::Threshold> sensor_thresholds;
@@ -32,8 +31,7 @@
 TEST(HwmonTempSensor, TestTMP421)
 {
     boost::asio::io_service io;
-    auto system_bus =
-        std::make_shared<dbus::connection>(io, dbus::bus::session);
+    auto system_bus = std::make_shared<dbus::connection>(io, dbus_t::session);
     dbus::DbusObjectServer object_server(system_bus);
 
     std::vector<thresholds::Threshold> sensor_thresholds;