See merge request nexedi/slapos!1336

`maxSession` is a selenium node option

`slotQuantity` set the number of slots by node meaning the maximum number of
session for a node.

Otherwise promise won't fail even if frontend is not yet here
and partition will not be processed until next day when
a bang happens

  This is required to install lxml-python dependencies which is a
  sub dependency of jupyter

  This is a PoC to compile wendelin and slapos-master with python3, and
  specially to run the tests.

Publish public link to websocket served by our CDN
so that clients can connect to the websocket using
Amarisoft GUI

Latest version is needed to authenticate to websocket
with a password

test software failed to install since 1e9a9019 (pygolang: Accompany
python-interpreter with gpython-interpreter to run gpython instead of
std python, 2024-05-06)

after bc5291df (component/openssl: version up 1.1.1w-0+deb11u2., 2024-11-12)
patch no longer applied, because patch options were moved out of this section

See merge request nexedi/slapos!1688

Make it possible to mock any specific cron entry.

Those are candidates to be shared by some other place, like slapos testing.

See merge request !1693