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: I9029cc722e7712633c15436bd3868d8c3209f567
diff --git a/control/fan.cpp b/control/fan.cpp
index e067205..d368791 100644
--- a/control/fan.cpp
+++ b/control/fan.cpp
@@ -32,7 +32,7 @@
 constexpr auto FAN_SENSOR_PATH = "/xyz/openbmc_project/sensors/fan_tach/";
 constexpr auto FAN_TARGET_PROPERTY = "Target";
 
-Fan::Fan(sdbusplus::bus::bus& bus, const FanDefinition& def) :
+Fan::Fan(sdbusplus::bus_t& bus, const FanDefinition& def) :
     _bus(bus), _name(std::get<fanNamePos>(def)),
     _interface(std::get<targetInterfacePos>(def))
 {
@@ -66,7 +66,7 @@
                 _bus, sensor.second, sensor.first, _interface,
                 FAN_TARGET_PROPERTY, std::move(value));
         }
-        catch (const sdbusplus::exception::exception&)
+        catch (const sdbusplus::exception_t&)
         {
             throw util::DBusPropertyError{"DBus set property failed",
                                           sensor.second, sensor.first,