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: I6de31883b9f6a9a3115ae232575dffbdf652e0bd
diff --git a/users.cpp b/users.cpp
index 4efc2b2..239459a 100644
--- a/users.cpp
+++ b/users.cpp
@@ -61,7 +61,7 @@
 Users::Users(sdbusplus::bus::bus& bus, const char* path,
              std::vector<std::string> groups, std::string priv, bool enabled,
              UserMgr& parent) :
-    Interfaces(bus, path, true),
+    Interfaces(bus, path, Interfaces::action::defer_emit),
     userName(sdbusplus::message::object_path(path).filename()), manager(parent)
 {
     UsersIface::userPrivilege(priv, true);