This reverts commit 31eaaec1a2bd8bc8648a686a83be989a9615a93e.

This slows down business template by a factor of two and it seems we
don't need it. I'm experimenting with hacks in ppml.py but maybe just
creating the Unpickler with encoding='utf-8' in
product/ERP5Type/XMLExportImport/__init__.py:267 is enough ?

at this point they all fail after long timeouts, because neo does not
support py3 yet

see 2a457867 (erp5: Rework testrunner's HTTP server, 2018-09-04), with
python3 the timing is not same and sometimes the parameter was not
propagated before root partitions promise were all solved, this add a
promise at the root partition to ensure the parameter is propagated

this promise should be enabled regardless of test runner configuration

Not sure why it was OK on python2 and not sure if this has to be done
or the promise code needs to cast the results of getConfig()

Otherwise it fails with the following exception because of non-ASCII characters
(`[A-Z&é@{]{3,7})`) (see unconvert()) below):

  => erp5_core/PathTemplateItem/portal_preferences/default_site_preference.xml
     File "zodbpickle-2.0.0-py3.7-linux-x86_64.egg/zodbpickle/pickle_3.py", line 844, in load
        dispatch[key[0]](self)
     File "zodbpickle-2.0.0-py3.7-linux-x86_64.egg/zodbpickle/pickle_3.py", line 1035, in load_short_binstring
        self.append(self.decode_string(data))
     File "zodbpickle-2.0.0-py3.7-linux-x86_64.egg/zodbpickle/pickle_3.py", line 989, in decode_string
        return value.decode(self.encoding, self.errors)
  UnicodeDecodeError: 'ascii' codec can't decode byte 0xc3 in position 19: ordinal not in range(128)

This reverts commit 6c399134.

See merge request nexedi/slapos!1407

See merge request !1399

Fix takoever of a theia with initial embedded instance. The issue was
that the promise checking that the embedded instance was successfully
requested relied on files which were not transferred to backup theia.

The location of these files has been changed in order to transfer them;
therefore the old location is still checked for upgrade-compatibility.

Test that takeover of theia with an initial embedded instance succeeds.

See merge request !1403

Now each partiton in slapos-sr-testing has its own IPv6 thanks to
ipv6 range, takeover url changes after takoever, so up-to-date
connection parameters need to be fetched before doing a second
takeover.

restart restic after renewing certificate, using the same approach as
software/dufs

Because dufs only reads certificate on startup it does not detect when
the certificate was renewed.

The only thing supported by dufs is to restart, so we use hash-files
options of wrapper recipe to

Resiliency import script had a race condition where the proxy might not
have finished restarting before formatting the partitions, causing the
import script to randomly fail during format because the proxy is down
when format tries to send it updated computer information.

See merge request nexedi/slapos!1406