ERP5 related test locations can be calculated by eggs:extra-paths, instead of globbing from all parts.

Parameters are not final yet, and must evolve to get something resilient to
frontend "movements" (ex: frontend machine dying and frontend being
re-allocated on another, or frontend being replaced by an instance from
another software release - as it will happen for upgrades).

Modifed from original version by Rafael in order to fix conflicts
on md5 of the files and changes on same file done in multiple branches.

All Products that are not packaged as python distributions need to be placed into a "Products" package since ZEO might need to be able to import them anyway.

And remove products-deps, since ExtFile is also no longer needed

And add polib for parsing .po Files into Localizer. This is used
instead of itools.gettext, which is removed in the ERP5 itools fork

Also, as backward compatibility is not needed at this level, implement what
is requested in BBB comment.

This reverts commit a26dcf05.

Revert "use erp5-component branch of erp5 repository for erp5-component branch of slapos repository."

This reverts commit 1766ba21.

CA-related section do not make obviously sense to be merged, so keep
them separated.

No generic and readable serialisation mechanism protect us against the
appearance of the following strings:
- "${"
- " ;"
As those have a special meaning for buildout, they need to be escaped.
So we must use a buildout-specific serialisation format taking care of
those.

Also, hide ip_list for the same reason: it's a partition property, not a
partition parameter. It is not handled yet (not needed).
Also, rework documentation a bit.

Prepares "slapparameters" recipe renaming.