Now the testing partition is able to fetch data from tested VM, by using
its public ipv6 address, to which the VM can post results.

This is first step of reusing KVM SR with own instance configuration.

This is backup commit

In order to work in deep directory structures it is required to have
kvm-controller script wrapped to avoid shabang limit.

Since release of ipython 6.0.0 (
https://pypi.python.org/pypi/ipython/6.0.0 ) ipython became incompatible
with python < 3.3, so its version needs to be pinned.

Known nodejs bug[1] has proposed fix [2] applied directly here.

[1] https://github.com/nodejs/node/issues/9137
[2] https://github.com/riedonetworks/meta-nodejs/commits/dora/recipes/nodejs/files/0001-fix-execvp-printf-argument-list-too-long.patch

It already happened that the first tests of the suite failed
because the MySQL server was not fully started:

    OperationalError: (2002, 'Can\'t connect to local MySQL server through socket \'.../var/run/mariadb.sock\' (2 "No such file or directory")')

  We require 8 spaces after the second line for adjust the layout at the generated file.

perl/bin/enc2xs can be a shell script that calls enc2xs.shebang so we
cannot call it explicitly with perl like "/path/to/perl
/path/to/enc2xs" but simply calling "/path/to/enc2xs" is enough and
safe.

  Make the integration with erp5testnode separeted from original SR.
  Optimise KVM resilient tests by downloading the test image on the software release site,
  without change the original SR. (This will sabe internet and speed up result).

also drop non-existing '--with-nm' option.

  The image still way too big but it is better the whole image

  This is just cosmetics.

  This fixes bugs on the order of parts and duplicated sections introduced on:
    8d28b7e0
    d3df3b6e

  Simple Don't repeat yourself.

  This change allow us simplify accross the instances usage of logrotate