Some information (like the actual buildout command used to invoke buildout ) is shown only when slapos node runs with `-v`

See merge request !190

When running with shared parts from slaprunner, we'll have path with
double slashes like:

    /srv/slapgrid/slappart3/srv//runner//shared/libexpat/468993ea3777c1a342102bc1c4b43425/lib/libexpat.so.1

because slaprunner has some paths with double slash.

See merge request !191

In this way is possible to follow up deployments more closely.

  This should be ensured by configurator

The form just request inform the user to select another name

On certain cases, the invoice is created later on by activies.

This script was introduced for anonymous payments but the procedure was replaced.

When running with shared parts from slaprunner, we'll have path with
double slashes like:

    /srv/slapgrid/slappart3/srv//runner//shared/libexpat/468993ea3777c1a342102bc1c4b43425/lib/libexpat.so.1

because slaprunner has some paths with double slash.

  Add tests for SubscriptionRequest_verifyPaymentTransaction

This command was identical from slapos cache lookup, but the meaning is
different.

Also update to use download-cache-url from config.

/reviewed-on nexedi/slapos.core!189

/reviewed-on nexedi/slapos.core!146

This is what most of tools understand, test_requires is something that
only python setup.py test uses.

In our normal operations, we are not using PYTHONPATH but using buildout
to generate wrappers. We are still using python setup.py test to run
tests, which sets PYTHONPATH to the eggs used by this python and this
cause issues when this python starts subprocesses, especially when it
starts another version of python which is supposed to use a different
set of eggs.

also add missing test for slapos node boot

/reviewed-on nexedi/slapos.core!187

As the query is done by annonymous with proxy role, so it is faster to just skip the usage of security_uids

Make web_site_id and panel_gadget_id, so we can reuse on private and custom websites.

It is more confortable to the user knows that a redirect will occur.

The recursive call makes the tree be rendered as hidden inputs respecting all the values

On python3.6 this raises:

 sqlite3.OperationalError: cannot VACUUM from within a transaction

https://www.python.org/dev/peps/pep-0508 is less verbose.

This reverts commit 03d0be06.