sdbusplus: object: don't use 'bool' argument constructor

`sdbusplus::server::object_t` has long had an enum-based parameter for
signal action, but maintained a backwards compatible boolean mapping.
It is time to remove this boolean to make it more observable which
actions are being used in applications.  Map all `true` occurrences to
`action::defer_emit`.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I5cfac1360e8c769889b33bef98cfd44778018a44
diff --git a/scheduled_host_transition.hpp b/scheduled_host_transition.hpp
index 3e24f89..4d917af 100644
--- a/scheduled_host_transition.hpp
+++ b/scheduled_host_transition.hpp
@@ -31,7 +31,8 @@
   public:
     ScheduledHostTransition(sdbusplus::bus::bus& bus, const char* objPath,
                             const sdeventplus::Event& event) :
-        ScheduledHostTransitionInherit(bus, objPath, true),
+        ScheduledHostTransitionInherit(
+            bus, objPath, ScheduledHostTransition::action::defer_emit),
         bus(bus), event(event),
         timer(event, std::bind(&ScheduledHostTransition::callback, this))
     {