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: Ie8ecdadfa03f1f7a4a369b6981a360009fe71420
diff --git a/bmc/general_systemd.cpp b/bmc/general_systemd.cpp
index 69b965b..ce16d14 100644
--- a/bmc/general_systemd.cpp
+++ b/bmc/general_systemd.cpp
@@ -44,14 +44,13 @@
 
     try
     {
-        jobMonitor.emplace(
-            bus,
-            "type='signal',"
-            "sender='org.freedesktop.systemd1',"
-            "path='/org/freedesktop/systemd1',"
-            "interface='org.freedesktop.systemd1.Manager',"
-            "member='JobRemoved',",
-            [&](sdbusplus::message::message& m) { this->match(m); });
+        jobMonitor.emplace(bus,
+                           "type='signal',"
+                           "sender='org.freedesktop.systemd1',"
+                           "path='/org/freedesktop/systemd1',"
+                           "interface='org.freedesktop.systemd1.Manager',"
+                           "member='JobRemoved',",
+                           [&](sdbusplus::message_t& m) { this->match(m); });
 
         auto method = bus.new_method_call(systemdService, systemdRoot,
                                           systemdInterface, "StartUnit");
@@ -93,7 +92,7 @@
         std::fprintf(stderr, "Canceled %s: %s\n", triggerService.c_str(),
                      job->c_str());
     }
-    catch (const sdbusplus::exception::exception& ex)
+    catch (const sdbusplus::exception_t& ex)
     {
         std::fprintf(stderr, "Failed to cancel job %s %s: %s\n",
                      triggerService.c_str(), job->c_str(), ex.what());
@@ -110,7 +109,7 @@
     return mode;
 }
 
-void SystemdNoFile::match(sdbusplus::message::message& m)
+void SystemdNoFile::match(sdbusplus::message_t& m)
 {
     if (!job)
     {
@@ -126,7 +125,7 @@
     {
         m.read(job_id, job_path, unit, result);
     }
-    catch (const sdbusplus::exception::exception& e)
+    catch (const sdbusplus::exception_t& e)
     {
         std::fprintf(stderr, "Bad JobRemoved signal %s: %s\n",
                      triggerService.c_str(), e.what());
@@ -151,17 +150,15 @@
     }
 }
 
-std::unique_ptr<TriggerableActionInterface>
-    SystemdNoFile::CreateSystemdNoFile(sdbusplus::bus::bus&& bus,
-                                       const std::string& service,
-                                       const std::string& mode)
+std::unique_ptr<TriggerableActionInterface> SystemdNoFile::CreateSystemdNoFile(
+    sdbusplus::bus_t&& bus, const std::string& service, const std::string& mode)
 {
     return std::make_unique<SystemdNoFile>(std::move(bus), service, mode);
 }
 
 std::unique_ptr<TriggerableActionInterface>
     SystemdWithStatusFile::CreateSystemdWithStatusFile(
-        sdbusplus::bus::bus&& bus, const std::string& path,
+        sdbusplus::bus_t&& bus, const std::string& path,
         const std::string& service, const std::string& mode)
 {
     return std::make_unique<SystemdWithStatusFile>(std::move(bus), path,
diff --git a/bmc/general_systemd.hpp b/bmc/general_systemd.hpp
index 9b33460..4df4747 100644
--- a/bmc/general_systemd.hpp
+++ b/bmc/general_systemd.hpp
@@ -15,11 +15,10 @@
 {
   public:
     static std::unique_ptr<TriggerableActionInterface>
-        CreateSystemdNoFile(sdbusplus::bus::bus&& bus,
-                            const std::string& service,
+        CreateSystemdNoFile(sdbusplus::bus_t&& bus, const std::string& service,
                             const std::string& mode);
 
-    SystemdNoFile(sdbusplus::bus::bus&& bus, const std::string& service,
+    SystemdNoFile(sdbusplus::bus_t&& bus, const std::string& service,
                   const std::string& mode) :
         bus(std::move(bus)),
         triggerService(service), mode(mode)
@@ -38,15 +37,15 @@
     const std::string& getMode() const;
 
   private:
-    sdbusplus::bus::bus bus;
+    sdbusplus::bus_t bus;
     const std::string triggerService;
     const std::string mode;
 
-    std::optional<sdbusplus::bus::match::match> jobMonitor;
+    std::optional<sdbusplus::bus::match_t> jobMonitor;
     std::optional<std::string> job;
     ActionStatus currentStatus = ActionStatus::unknown;
 
-    void match(sdbusplus::message::message& m);
+    void match(sdbusplus::message_t& m);
 };
 
 /**
@@ -67,12 +66,12 @@
      * @param[in] mode - the job-mode when starting the systemd Unit.
      */
     static std::unique_ptr<TriggerableActionInterface>
-        CreateSystemdWithStatusFile(sdbusplus::bus::bus&& bus,
+        CreateSystemdWithStatusFile(sdbusplus::bus_t&& bus,
                                     const std::string& path,
                                     const std::string& service,
                                     const std::string& mode);
 
-    SystemdWithStatusFile(sdbusplus::bus::bus&& bus, const std::string& path,
+    SystemdWithStatusFile(sdbusplus::bus_t&& bus, const std::string& path,
                           const std::string& service, const std::string& mode) :
         SystemdNoFile(std::move(bus), service, mode),
         checkPath(path)