A set of commits aimed at reducing the occurences of CI test failures.

[borine]

There are still some occasional failures remaining, but overall the failure rate is greatly improved.

Tests with known races that can still cause failure:

• test-alsa-pcm:test_playback_hw_set_free
• test-utils-aplay:test_play_dbus_signals
• test-rfcomm

Tests that may still occasionally fail for unknown reasons:

• test-dbus
• test-alsa-midi

[codecov[bot]]

Codecov Report

:x: Patch coverage is 93.33333% with 1 line in your changes missing coverage. Please review. :white_check_mark: Project coverage is 70.22%. Comparing base (3851218) to head (bed15cd).

Files with missing lines	Patch %	Lines
test/test-alsa-midi.c	0.00%	1 Missing :warning:

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #777      +/-   ##
==========================================
- Coverage   70.52%   70.22%   -0.30%     
==========================================
  Files         101      101              
  Lines       16788    16797       +9     
  Branches     2643     2645       +2     
==========================================
- Hits        11839    11796      -43     
- Misses       4833     4885      +52     
  Partials      116      116              

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