RunConfigurationAspect: Streamline data serialization

Change-Id: I6f49dd9eeff53eafc51bd5238ca655437df12111
Reviewed-by: Tobias Hunger <tobias.hunger@digia.com>
Reviewed-by: Daniel Teske <daniel.teske@digia.com>
Reviewed-by: hjk <hjk121@nokiamail.com>