Add initial version of script that synchronises missing reports

The script gets all yaml files from a remote server via rsync, checks
if the yaml reports are present in the raw report or santised directories
and copies them if they are not there

Also adding an example remote_servers file that contains the list of
remote servers we want to check
Once we have copied over each report we should also delete it on the remote host. This way we don't have to re-download them every time.