to also install test dependencies

Instead of running python setup.py that will install again egg with
maybe different versions of dependencies, use buildout way of installing
eggs and dependencies.

Also fix erp5-util erp5.util typo, we'll have to update test suites
defining a reporsitory for this.

thx @jerome

Depending on host python version the string "Build successful" renders
differently, so do not be too smart for it and simplify it.

In all examples of custom.js the Jupyter variable is capitalized, but
here it was not. Because of unknown reason, without Jupyter upgrade,
it stopped to working. Switching from "jupyter" to "Jupyter" fixes the
problem.

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 nexedi/slapos!295

@kazuhiko @arnau This reverts commit bf7c13c6.

/reviewed-on nexedi/slapos!296