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: Ibd4b55a2f12c55dee7b9763d62aeba2ddd124c8b
diff --git a/host-interface.hpp b/host-interface.hpp
index 05d76f6..8e56bd4 100644
--- a/host-interface.hpp
+++ b/host-interface.hpp
@@ -18,7 +18,7 @@
  *  @details A concrete implementation for org.open_power.Control.Host
  *  DBus API.
  */
-class Host : public sdbusplus::server::object::object<Base::Host>
+class Host : public sdbusplus::server::object_t<Base::Host>
 {
   public:
     /** @brief Constructs Host Control Interface
@@ -26,8 +26,8 @@
      *  @param[in] bus     - The Dbus bus object
      *  @param[in] objPath - The Dbus object path
      */
-    Host(sdbusplus::bus::bus& bus, const char* objPath) :
-        sdbusplus::server::object::object<Base::Host>(bus, objPath), bus(bus)
+    Host(sdbusplus::bus_t& bus, const char* objPath) :
+        sdbusplus::server::object_t<Base::Host>(bus, objPath), bus(bus)
     {
         // Nothing to do
     }
@@ -43,7 +43,7 @@
 
   private:
     /** @brief sdbusplus DBus bus connection. */
-    sdbusplus::bus::bus& bus;
+    sdbusplus::bus_t& bus;
 
     /** @brief  Callback function to be invoked by command manager
      *
diff --git a/oemhandler.cpp b/oemhandler.cpp
index a2f4fce..b850e44 100644
--- a/oemhandler.cpp
+++ b/oemhandler.cpp
@@ -79,7 +79,7 @@
     return {};
 }
 
-std::string getService(sdbusplus::bus::bus& bus, const std::string& path,
+std::string getService(sdbusplus::bus_t& bus, const std::string& path,
                        const std::string& interface)
 {
     auto method = bus.new_method_call(MAPPER_BUS_NAME, MAPPER_OBJ, MAPPER_IFACE,
@@ -103,7 +103,7 @@
             return std::string{};
         }
     }
-    catch (const sdbusplus::exception::exception& e)
+    catch (const sdbusplus::exception_t& e)
     {
         log<level::ERR>("Error in mapper method call",
                         entry("ERROR=%s", e.what()));
@@ -345,7 +345,7 @@
                                           ipmi_data_len_t data_len,
                                           ipmi_context_t context)
 {
-    sdbusplus::bus::bus bus{ipmid_get_sd_bus_connection()};
+    sdbusplus::bus_t bus{ipmid_get_sd_bus_connection()};
 
     // Since this is a one way command (i.e. the host is requesting a power
     // off of itself and a reboot of the BMC) we can exceed the 5 second
@@ -369,7 +369,7 @@
     {
         bus.call_noreply(method);
     }
-    catch (const sdbusplus::exception::exception& e)
+    catch (const sdbusplus::exception_t& e)
     {
         log<level::ERR>("Error powering off the chassis",
                         entry("ERROR=%s", e.what()));
@@ -386,7 +386,7 @@
     {
         bus.call_noreply(method);
     }
-    catch (const sdbusplus::exception::exception& e)
+    catch (const sdbusplus::exception_t& e)
     {
         log<level::ERR>("Error setting factory reset",
                         entry("ERROR=%s", e.what()));
@@ -415,7 +415,7 @@
     {
         bus.call_noreply(method);
     }
-    catch (const sdbusplus::exception::exception& e)
+    catch (const sdbusplus::exception_t& e)
     {
         log<level::ALERT>("Error calling to reboot the BMC. The BMC needs to "
                           "be manually rebooted to complete the factory reset.",
@@ -431,7 +431,7 @@
 // Storage to keep the object alive during process life
 std::unique_ptr<open_power::host::command::Host> opHost
     __attribute__((init_priority(101)));
-std::unique_ptr<sdbusplus::server::manager::manager> objManager
+std::unique_ptr<sdbusplus::server::manager_t> objManager
     __attribute__((init_priority(101)));
 } // namespace
 
@@ -455,7 +455,7 @@
 
     // Add sdbusplus ObjectManager.
     auto& sdbusPlusHandler = ipmid_get_sdbus_plus_handler();
-    objManager = std::make_unique<sdbusplus::server::manager::manager>(
+    objManager = std::make_unique<sdbusplus::server::manager_t>(
         *sdbusPlusHandler, CONTROL_HOST_OBJ_MGR);
 
     opHost = std::make_unique<open_power::host::command::Host>(