test_omit_all_processes_except_one is racy and fails sometimes

[Benjamin Drung]

The test case test_omit_all_processes_except_one is racy and fails sometimes:

```
test_omit_all_processes_except_one (tests.system.test_unkillable_shutdown.TestUnkillableShutdown)
unkillable_shutdown will write exactly one report. ... Running as unit: run-r0b0d3fe87473410c9eb61a5ae4635938.service
FAIL
======================================================================
FAIL: test_omit_all_processes_except_one (tests.system.test_unkillable_shutdown.TestUnkillableShutdown)
unkillable_shutdown will write exactly one report.
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/tmp/autopkgtest.JJoBfX/autopkgtest_tmp/tests/system/test_unkillable_shutdown.py", line 96, in test_omit_all_processes_except_one
    pid = self._launch_process_with_different_session_id(existing_pids)
  File "/tmp/autopkgtest.JJoBfX/autopkgtest_tmp/tests/system/test_unkillable_shutdown.py", line 90, in _launch_process_with_different_session_id
    self.assertEqual(len(test_executable_pids), 1, test_executable_pids)
AssertionError: 0 != 1 : set()

----------------------------------------------------------------------
```

autopkgtest log: https://autopkgtest.ubuntu.com/results/autopkgtest-kinetic/kinetic/amd64/a/apport/20220912_055849_5f03e@/log.gz

[Benjamin Drung (bdrung)]

Proposed fix: https://github.com/canonical/apport/pull/3

[Benjamin Drung (bdrung)]

Fix committed upstream: https://github.com/canonical/apport/commit/bb7cd6f08d16749c501ef893d5056a20a82346fd

[Launchpad Janitor (janitor)]

This bug was fixed in the package apport - 2.23.0-0ubuntu2

---------------
apport (2.23.0-0ubuntu2) kinetic; urgency=medium

  * tests: Wait for test process to be started (LP: #1989365)
  * tests: Fix psutil.NoSuchProcess in wait_for_gdb_child_process
    (LP: #1989371)

 -- Benjamin Drung <email address hidden> Thu, 15 Sep 2022 14:04:42 +0200