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: I19e094a2a99893627dbb82b615f630b87ad90fdd
diff --git a/phosphor-ldap-config/ldap_config.cpp b/phosphor-ldap-config/ldap_config.cpp
index e37faab..8f2e303 100644
--- a/phosphor-ldap-config/ldap_config.cpp
+++ b/phosphor-ldap-config/ldap_config.cpp
@@ -49,7 +49,7 @@
 using Val = std::string;
 using ConfigInfo = std::map<Key, Val>;
 
-Config::Config(sdbusplus::bus::bus& bus, const char* path, const char* filePath,
+Config::Config(sdbusplus::bus_t& bus, const char* path, const char* filePath,
                const char* caCertFile, const char* certFile, bool secureLDAP,
                std::string ldapServerURI, std::string ldapBindDN,
                std::string ldapBaseDN, std::string&& ldapBindDNPassword,
@@ -106,7 +106,7 @@
     parent.startOrStopService(nslcdService, enabled());
 }
 
-Config::Config(sdbusplus::bus::bus& bus, const char* path, const char* filePath,
+Config::Config(sdbusplus::bus_t& bus, const char* path, const char* filePath,
                const char* caCertFile, const char* certFile,
                ConfigIface::Type ldapType, ConfigMgr& parent) :
     Ifaces(bus, path, Ifaces::action::defer_emit),
@@ -137,7 +137,7 @@
     configPersistPath += "/config";
 }
 
-void Config::certificateInstalled(sdbusplus::message::message& /*msg*/)
+void Config::certificateInstalled(sdbusplus::message_t& /*msg*/)
 {
     try
     {
@@ -158,7 +158,7 @@
     }
 }
 
-void Config::certificateChanged(sdbusplus::message::message& msg)
+void Config::certificateChanged(sdbusplus::message_t& msg)
 {
     std::string objectName;
     std::map<std::string, std::variant<std::string>> msgData;