this fixes 86ce8b8e which had an error
the current_output variable was not reset when the current output ended
in \n.

As a result, logged output was sometimes containing some parts of the
program output twice. We could even catch it in unit test, when running
the test multiple times. It also happened on test node with
https://erp5js.nexedi.net/#/test_result_module/20210826-1706D7F50/10

The is trivial, we reset the current output also in this case. The test
suite is extended a bit, with added tests and test adjustments made during
the debugging. With test_exec_large_output_multiline the problem triggers
almost every time.

   This is basically dead code, and untested.

See merge request !328

Also migrate Computer Partition to Compute Partition

Keep permissions on the computer module to allow computer_module/Base_getComputerToken call

libslap must continue to use the same class names for compatibility.

Changes are made to keep the migration as simple as possible:
  * do not change the catalog table/column names
  * do not change the local_role's names and the related categories
  * keep Computer Consumption portal type
  * keep portal_id's group name
  * keep SLA compatibility
  * keep SlapTool compatibility

SlapTool: restore compatibility with Hosting Subscription method

   The property changed into a List rather them a string

  Even if the Map had no markers, display some location meaningful instead a point into the occean

  Since we use latitude/longitude, "Region" is irrelelant.

Use correct script.

  Contributed by Romain Courteud

  When upgrade the site, we shouldn't revert the count, else it may lead to duplicated values.

slapos_cloud: fixup nexedi/slapos.core@be0d00d6

Half commited propertysheets change

   This fixup mostly the status column and introduces type (since it is multiple type entry).

    The uid is kept the same so updateRelatedContent don't need to reindex the related object in this specific case.

   This save us double indexation activities triggerred on different moments.

With recursive instances, it was possible that the slapos.cfg introduce a
kind of loop and this was checking again and again the same folders.

Fix this by keeping track of the visited instance root and not visit the
same instance root twice.

See merge request !327

See merge request !326

This test was using time.strftime which uses the current machine timezone,
but collection is done in UTC timezone, so the test was sometimes failing
because the strftime('%Y-%m-%d') was another day than the same time in
UTC time zone.

This test https://erp5js.nexedi.net/#/test_result_module/20210811-96D6B55F/8
for example had the problem. By using faketime and TZ=Europe/Paris
environment variable, the same problems reproduced locally 100% of times.

The fix is to always use datetime.utcnow().strftime('%Y-%m-%d'), to not
depend on the timezone.

Don't buffer output and use a separate thread to read subprocess process output
and send it line by line to logging, instead of reading from the main thread
which output lines with a delay.

fixes https://erp5js.nexedi.net/#/bug_module/20210311-90BA30

To consider if a shared part is used, we consider all files named `slapos.cfg`
in the instance and try to parse them as a slapos config file.
The problem was that as soon as a file can not be parsed as a slapos config
file, we did not continue to evaluate other `slapos.cfg` files. It was a
`return` where it should have been a `continue`.

This was especially incorrect, because when we have recursive slapos, we
usually have a working copy of slapos repository, which contain
`stack/slapos.cfg`, which is not a valid slapos config file.

As a result, when a top level shared part was used in a software installed
in the recursive slapos from a theia or slaprunner instance, this shared
part was not detected as used and could have been deleted.

The fix consist in checking all `slapos.cfg` files. This will make slapos
node prune command probably much slower, because it will really iterate on
all files now. Anyway this was fast because it was wrong.

See merge request !324

  This changes aims minimize the unecessary accessed to master while the
  instance is going to be skipped to process or won't post informations to master.

  This in best cases reduces access from 1+n to 1 while n = number of used partitions.

  Fixed up after the (revert)