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: I46a5eec210002af84239af74a93c830b1d4a13f1
diff --git a/include/hostname_monitor.hpp b/include/hostname_monitor.hpp
index 738dc1b..3fb42e4 100644
--- a/include/hostname_monitor.hpp
+++ b/include/hostname_monitor.hpp
@@ -11,7 +11,7 @@
 {
 namespace hostname_monitor
 {
-static std::unique_ptr<sdbusplus::bus::match::match> hostnameSignalMonitor;
+static std::unique_ptr<sdbusplus::bus::match_t> hostnameSignalMonitor;
 
 inline void installCertificate(const std::filesystem::path& certPath)
 {
@@ -41,7 +41,7 @@
         return 0;
     }
 
-    sdbusplus::message::message message(m);
+    sdbusplus::message_t message(m);
     std::string iface;
     dbus::utility::DBusPropertiesMap changedProperties;
 
@@ -133,7 +133,7 @@
          "arg0='xyz.openbmc_project.Network.SystemConfiguration',"
          "member='PropertiesChanged'");
 
-    hostnameSignalMonitor = std::make_unique<sdbusplus::bus::match::match>(
+    hostnameSignalMonitor = std::make_unique<sdbusplus::bus::match_t>(
         *crow::connections::systemBus, propertiesMatchString, onPropertyUpdate,
         nullptr);
 }