Also put back certificates on software release url.

This is the only remote url which is going to be trusted outside of buildout.

Fetching list of keys over the network from non signed url has no sense.

This reverts commit 11150b66.

Hack was needed in damaged environment, which did not managed to have correct
symlinks.

On some platforms it is required.

If multiple calls manage_addERP5Site are done in parallel by this script,
it cause conflict error during site creation.

1.3.0 has building process which has been found to be cumbersome on some platforms.

Only check if cloudooo and openoffice port is listenning.

This definition is present already into a more appropriate place, on
erp5-promise.

The erp5 is created by erp5-bootstrap, this promise assert if the site
is already created.

Conflicts:
	software/erp5/software.cfg

All ERP5 profile is now in a single place.
Moreover, use slapos.cfg stack.

Fewer parameters, one more dependency.

This reverts commit a3cf70c9.

This version forces h.r.download to clean its own mess in /tmp.