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: Ibd2a0b512bfb7caf65bfab64b271d194da520aac
diff --git a/read_fru_data.cpp b/read_fru_data.cpp
index 908e54e..fe61a61 100644
--- a/read_fru_data.cpp
+++ b/read_fru_data.cpp
@@ -44,7 +44,7 @@
                                     const std::string& path)
 {
     ipmi::PropertyMap properties;
-    sdbusplus::bus::bus bus{ipmid_get_sd_bus_connection()};
+    sdbusplus::bus_t bus{ipmid_get_sd_bus_connection()};
     std::string service;
     std::string objPath;
 
@@ -68,7 +68,7 @@
         auto reply = bus.call(method);
         reply.read(properties);
     }
-    catch (const sdbusplus::exception::exception& e)
+    catch (const sdbusplus::exception_t& e)
     {
         // If property is not found simply return empty value
         log<level::ERR>("Error in reading property values",
@@ -80,7 +80,7 @@
     return properties;
 }
 
-void processFruPropChange(sdbusplus::message::message& msg)
+void processFruPropChange(sdbusplus::message_t& msg)
 {
     if (cache::fruMap.empty())
     {
@@ -112,7 +112,7 @@
     if (matchPtr == nullptr)
     {
         using namespace sdbusplus::bus::match::rules;
-        sdbusplus::bus::bus bus{ipmid_get_sd_bus_connection()};
+        sdbusplus::bus_t bus{ipmid_get_sd_bus_connection()};
         matchPtr = std::make_unique<sdbusplus::bus::match_t>(
             bus,
             path_namespace(invObjPath) + type::signal() +