Switch sd_event loops to sdeventplus

This change is mostly focused around plumbing the sdeventplus::Event
object everywhere and using the member functions provided for the event.
No migration to the timer utility is performed yet.

Change-Id: I912ab82bc081239d3b7c3cf7c5caca6742ef9c87
Signed-off-by: William A. Kennington III <wak@google.com>
diff --git a/monitor/fan.cpp b/monitor/fan.cpp
index 39b32bb..014080d 100644
--- a/monitor/fan.cpp
+++ b/monitor/fan.cpp
@@ -31,7 +31,7 @@
 
 Fan::Fan(Mode mode,
          sdbusplus::bus::bus& bus,
-         phosphor::fan::event::EventPtr&  events,
+         const sdeventplus::Event&  event,
          std::unique_ptr<trust::Manager>& trust,
          const FanDefinition& def) :
     _bus(bus),
@@ -58,7 +58,7 @@
                             std::get<factorField>(s),
                             std::get<offsetField>(s),
                             std::get<timeoutField>(def),
-                            events));
+                            event));
 
             _trustManager->registerSensor(_sensors.back());
         }