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:
  * exception_t
  * manager_t
  * match
  * match_rules
  * message_t
  * object_t
  * slot_t

Change-Id: I993295382740f09f2ffa4713cbdd84b5137116d5
Signed-off-by: Patrick Williams <patrick@stwcx.xyz>

fw-update/systemd_interface.hpp

diff --git a/fw-update/systemd_interface.hpp b/fw-update/systemd_interface.hpp
index 6214201..945e340 100644
--- a/fw-update/systemd_interface.hpp
+++ b/fw-update/systemd_interface.hpp
@@ -18,7 +18,7 @@
 namespace pldm::fw_update
 {
 
-namespace sdbusRule = sdbusplus::bus::match::rules;
+namespace sdbusRule = sdbusplus::match_rules;
 
 /** @brief Escapes a string so that it is valid inside a systemd unit name.
  *
@@ -140,7 +140,7 @@
 
     sdbusplus::bus_t& bus;
 
-    sdbusplus::bus::match_t systemdSignals;
+    sdbusplus::match systemdSignals;
 
     std::map<sdbusplus::object_path, TaskCallback> taskCallbacks;