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: I41103c892db258a85640aa1442acd9a295c8a847
diff --git a/host_condition_gpio/host_condition.hpp b/host_condition_gpio/host_condition.hpp
index eaeefc7..35d8313 100644
--- a/host_condition_gpio/host_condition.hpp
+++ b/host_condition_gpio/host_condition.hpp
@@ -11,7 +11,7 @@
 namespace condition
 {
 
-using HostIntf = sdbusplus::server::object::object<
+using HostIntf = sdbusplus::server::object_t<
     sdbusplus::xyz::openbmc_project::Condition::server::HostFirmware>;
 
 class Host : public HostIntf
@@ -24,7 +24,7 @@
     Host& operator=(Host&&) = delete;
     virtual ~Host() = default;
 
-    Host(sdbusplus::bus::bus& bus, const std::string& path,
+    Host(sdbusplus::bus_t& bus, const std::string& path,
          const std::string& hostId) :
         HostIntf(bus, path.c_str()),
         lineName("host" + hostId)