To get fixes from nexedi/userhosts!2

The main reason is to fix inkscape segfaults that break ERP5's svg to
image conversion.

So that we can use name aliases such as `erp5-memcached-volatile` during
tests.

A quick slapos profile for Grafana, InfluxDB and Telegraf.

/reviewed-on nexedi/slapos!286

This change unexpectedly break tests which uses supervisord running supervisord. @gabriel is confirming.



/reviewed-on nexedi/slapos!299

In order to track issues with software deployed in VM, provide more
introspective information about the VM itself.

This is needed for example for wendelin.core arrays + connections
See nexedi/slapos.core@b5a1e352

/reviewed-on nexedi/slapos!297

- overwrite slapos.cookbook:request.serialised with slapos.cookbook:request
- corresponfing md5sum updated

/reviewed-on nexedi/slapos!298

/reviewed-on nexedi/slapos!291

configure: WARNING: unrecognized options: --with-wepb

It is not needed to follow KVM development blindly and be hit by
bugs during the development.

If provided, shows instance name value in the title, so it is easier to track
and relate shellinabox with a webrunner.

/reviewed-on !295

@kazuhiko @arnau This reverts commit bf7c13c6.

/reviewed-on nexedi/slapos!296

This should fix the error below to run zope.

Error: invalid literal for int() with base 10: '10m' (line 39, in file:///srv/slapgrid/slappart7/srv/testnode/awf/inst/test0-7/etc/zope-0.conf)