unit tests

This service will provide an endpoint to upload videos and save them as file chunks in mongodb, the trough another endpoint you will get a video by id first from the mongo database and then the chunks will be sent to a kafka topic and from that topic the client will consume the chunks to show the video

Small LD_PRELOAD shared library that allows to freeze the wall clock to a specific time. The wall clock can be controlled through an environment variable ˋTIMEFREEZEˋ by the running process. This shall simplify writing unit tests that depend on time.