In case the instance isn't linked to the tree properly (due Garbage Collect unlinked it), stop the instance directly anyway.

Once per day is not real time monitoring, so drop it to each 5 minutes.

On python2, warnings.warn expects the message to be passed as a str
and it will silently output nothing when the message is an unicode
that can not be converted to str using ascii encoding (cf.
https://bugs.python.org/issue34752 )

Since october update of pyupio/safety-db there is a new vulnerability
for pytest-runner, which is described as:

    "pytest-runner": [
        {
            "advisory": "Pytest-runner depends on deprecated features of setuptools and relies on features that break security mechanisms in pip. For example \u2018setup_requires\u2019 and \u2018tests_require\u2019 bypass pip --require-hashes. See also pypa/setuptools#1684.\r\nIt is recommended that you:\r\n- Remove 'pytest-runner' from your setup_requires, preferably removing the setup_requires option.\r\n- Remove 'pytest' and any other testing requirements from tests_require, preferably removing the tests_requires option.\r\n- Select a tool to bootstrap and then run tests such as tox.",
            "cve": "PVE-2021-43313",
            "id": "pyup.io-43313",
            "specs": [
                ">0"
            ],
            "v": ">0"
        }
    ],

notice the quotes:

    \u2018setup_requires\u2019 and \u2018tests_require\u2019

this was sent to warnings.warn as unicode and because all our softwares
have this vulnerability (that BTW do not impact us because we run
buildout with a patch for setup_requires), we no longer saw any
warning on python2 software release tests.

pkg_resources.Environment only scans packages for the current python
version, but the checked software might be using a different python
version than the python version used to check software (the slapos
python). The checked software might also include packages for
multiples python versions.

Compute the list used python packages from the eggs directory and use
an Environment for each python version, this way we check all python
versions and also when slapos python and software python are different.

 - only consider shared parts from checked software
 - support new `.buildout-shared.json` signature files
 - unit test coverage

See merge request nexedi/slapos.core!361

See merge request nexedi/slapos.core!358

check_software was checking all shared parts, which was an easy
implementation but turned out to be problematic, both when running on
test nodes because if one software installs broken shared parts all
softwares being tested afterwards were failing and also during
development because we needed to prune broken shared parts when
fixing problems reported by check_software.

This inspects buildout's .installed.cfg to guess which shared parts
are used.

These are used in check software tests.

shutil.rmtree does not support files marked as read only by
slapos.recipe.build shared parts system and this test is now used
for testing of shared parts.

Since slapos.recipe.cmmi version 0.18, the signature files no longer
match the glob pattern that was used here, so check that shared
parts do not reference software parts was not effective anymore.

test detection of usage of shared library from system and of shared
parts referencing software

This reverts commit 2d50c8b8.

We are not ready for this, for example on debian 10 perl link with
libnsl.

For reference, one example test failure:
  https://erp5js.nexedi.net/#/test_result_module/20220111-190A520F2/20

We'll try to re-apply this later once no software use system libnsl

Since slapos commit 246be932e (component/libtirpc,libnsl: initial
inclusion, 2021-12-28) we have a slapos component, so no reason to
accept the system library

logrotate stack uses srv/backup/logrotate

This MR aims to introduce and extend the internal API with the support for manage:

   - Project
   - Organisation
   - Site (also Organisation)
   - Tokens
   - Computer Network
   
So via the introductions of workflows we included the following methods:

  - Project.approveRegistration()
  - Project.leaveProject()
  - Project.acceptInvitation()
  - Organisation.approveRegistration()
  - Organisation.leaveOrganisation()
  - Organisation.acceptInvitation()
  - Person.requestProject(project_title)
  - Person.requestOrganisation(organisation_title)
  - Person.requestSite(organisation_title)
  - Person.requestToken(request_url)
  - Person.requestNetwork(network_title)
  - ComputeNote.requestTransfer(...)
  - InstanceTree.requestTransfer(...) 
  - ComputerNetwork.approveRegistration()
  - ComputerNetwork.requestTransfer(...)
 
  
This API with minor exceptions, don't replaces the way the Hateoas/JIO website interacts with ERP5, so the original scripts are kept and just changed to call internal APIs.


See merge request nexedi/slapos.core!348

   Drop code that is never called anyway.

  This makes easy write or update tests per workflow-basis