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: I9029cc722e7712633c15436bd3868d8c3209f567
diff --git a/control/manager.cpp b/control/manager.cpp
index 023df39..e00f9b5 100644
--- a/control/manager.cpp
+++ b/control/manager.cpp
@@ -54,7 +54,7 @@
  * @param[in] condition - The condition to check if true
  * @return result       - True if the condition is true
  */
-bool checkCondition(sdbusplus::bus::bus& bus, const Condition& c)
+bool checkCondition(sdbusplus::bus_t& bus, const Condition& c)
 {
     auto& type = std::get<conditionTypePos>(c);
     auto& properties = std::get<conditionPropertyListPos>(c);
@@ -81,7 +81,7 @@
 }
 
 // Note: Future code will check 'mode' before starting control algorithm
-Manager::Manager(sdbusplus::bus::bus& bus, const sdeventplus::Event& event,
+Manager::Manager(sdbusplus::bus_t& bus, const sdeventplus::Event& event,
                  Mode mode) :
     _bus(bus),
     _objMgr(bus, CONTROL_OBJPATH)