Tentative fix for LoadCsvAcceptanceTest on windows (sanitizing filenames)
Adding cookie manager for downloading csv from websites which requires the client to handle cookies

o Add a helper class for spawning an http server for testing
o Add HttpServer for testing
Merge pull request #2097 from davidegrohmann/2.1-loadcsv-fixes

Load CSV fix acceptance test on Windows and add HttpServer for testing (which bind on a random free port chosen by the os)