This test was failing randomly because it uses a timeout of 0.5 seconds, which
is sometimes not enough to run commands.

Increase the timeout to something large enough so that we don't have timeout
failures when test machine is busy.

Also simplify the whole thing by using python instead of parsing the output
of processes.

- from now on we want the reports as .xz
- fix type argument parsing which should make the promise effective now

See merge request !83

this was not html.

Also use os.path.join to manipulate paths

this program was comparing floats parsed from the report text and strings from
arguments passed on the command line, so basically it was not doing what was
intended.

because pt-query-digest are text files that can be large, we should except that
the users have compressed them.

See merge request nexedi/slapos.toolbox!79

This reverts commit 87b96e1b.

This reverts commit 099295af.

This reverts commit a0aa8b35.

but read only as much as we expect to receive. It should make tests more
stable

As python3 only accept binary types for sockets

Keep log file for debugging and use cleanup function to be sure
to correctly stop services

to simplify the code

See merge request !81

this should be used on testcase in future too, to always bootstrap with the same code-base.

This depends this be released first: nexedi/slapos!747

/cc @jerome @Nicolas

See merge request !80

   The generation of the link and the verification were inconsistent, this commit
   normalize both.

   PS.: Software Links are deprecated, it should be removed in future, as it lost
   the goals

While adding the support in "promise: Support ssl_certificate in
check_surykatka_json" coverage for error reporting was missing, which has been
extended in this fix.

/reviewed-on nexedi/slapos.toolbox!78

This is another fixup for commit
1c8269b2.

This will lead to minimise amount of entries, and they will be only shown
when the status would change.

Improvements:

 * total_seconds from surykatka is parsed
 * failure-amount is configurable
 * various smaller bugfixes

/reviewed-on !77

Result of the promise is not important for instantiation.

Sites with bad certificates are reported with null values in surykatka
output, thus they have to be handled correctly.

It means that the server didn't reply at all.