Properly calculate the reported time of how much Lynara took

[pkucmus]

Currently Lynara counts the lifespan time as the time it look to process a requests - that is misleading and should be fixed:

lynara/src/lynara/runner.py

Lines 35 to 39 in de946c2

	LOGGER.info(
	"Lynara execution time: %.5f s, out of which interface time: %.5f s",
	(time() - start_time),
	(time() - interface_start_time),
	)