Fixed issue with wrong timestamp

Telemetry service used steady_clock for generating timestamps, but it
produced incorrect time. This change makes telemetry service use
steady_clock for intervals and system_clock for timestamps.

Changed readings timestamp to display current timestamp instead of a
time when reading was received.

Tested:
- correct timestamp is visible on dbus
- other telemetry service features are still working

Change-Id: Ic49f45640532cfffaeff5e0bd5591e6d99e5def5
Signed-off-by: Krzysztof Grobelny <krzysztof.grobelny@intel.com>
diff --git a/src/utils/detached_timer.hpp b/src/utils/detached_timer.hpp
index 636949c..ae97fab 100644
--- a/src/utils/detached_timer.hpp
+++ b/src/utils/detached_timer.hpp
@@ -1,6 +1,6 @@
 #pragma once
 
-#include "types/milliseconds.hpp"
+#include "types/duration_types.hpp"
 
 #include <boost/asio/io_context.hpp>
 #include <boost/asio/steady_timer.hpp>