also adds a bit to log-uploader. Currently can correctly request erp5-standalon

Since it has a file that needs installing (log-uploader), this is currently needed. Fixes issues from prior commit, utilising ansible modules properly

Updates how we're determining what software to install, and adjusts cronjob

The ipv6 address was not set up before 'slapos format' needed it, so it always failed

Contributed by Kristopher Ruzic (kristopher.ruzic@nexedi.com)

Now 'upgrader' should do also date comparation.

 In this way we can reuse the same roles for upgrade

 Install folder is exposed via a http server, so include an simple index.html.

This is unused code, preserved here for reference with kiwi procedure for default vifib server.

Restrict upgrade egg from a safe hardcoded source only