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: Ibd2a0b512bfb7caf65bfab64b271d194da520aac
diff --git a/sensordatahandler.hpp b/sensordatahandler.hpp
index 54bd909..89d00d0 100644
--- a/sensordatahandler.hpp
+++ b/sensordatahandler.hpp
@@ -46,7 +46,7 @@
  *  @param[in] path - interested path in the list of objects
  *  @return pair of service path and service
  */
-ServicePath getServiceAndPath(sdbusplus::bus::bus& bus,
+ServicePath getServiceAndPath(sdbusplus::bus_t& bus,
                               const std::string& interface,
                               const std::string& path = std::string());
 
@@ -181,7 +181,7 @@
 template <typename T>
 GetSensorResponse readingAssertion(const Info& sensorInfo)
 {
-    sdbusplus::bus::bus bus{ipmid_get_sd_bus_connection()};
+    sdbusplus::bus_t bus{ipmid_get_sd_bus_connection()};
     GetSensorResponse response{};
 
     enableScanning(&response);
@@ -210,7 +210,7 @@
 template <typename T>
 GetSensorResponse readingData(const Info& sensorInfo)
 {
-    sdbusplus::bus::bus bus{ipmid_get_sd_bus_connection()};
+    sdbusplus::bus_t bus{ipmid_get_sd_bus_connection()};
 
     GetSensorResponse response{};