Refactor db_profiler.pm to use current openQA best practices

[kraih]

This was a really strange module and quite inefficient. The OPENQA_SQL_DEBUG environment variable should now work consistently for all the webui services and use much less resources.

[kraih]

You can now do this.

$ OPENQA_SQL_DEBUG=1 script/openqa-scheduler daemon
[info] Listening at "http://127.0.0.1:9529"
Server available at http://127.0.0.1:9529
[info] Listening at "http://[::1]:9529"
Server available at http://[::1]:9529
[debug] [pid:26497] Scheduler default interval(ms): 1000
[debug] [pid:26497] Max job allocation: 80
[debug] [pid:26497] [DBIC] Took 0.00067401 seconds: SELECT COUNT( * ) FROM workers me
[debug] [pid:26497] [DBIC] Took 0.00040102 seconds: SELECT me.id, me.host, me.instance, me.job_id, me.upload_progress, me.error, me.t_created, me.t_updated FROM workers me WHERE ( ( error IS NULL AND job_id IS NULL ) )
[debug] [pid:26497] [rescheduling] Current tick is at 1000 ms. New tick will be in: 1000 ms
[debug] [pid:26497] [DBIC] Took 0.00073409 seconds: SELECT COUNT( * ) FROM workers me
[debug] [pid:26497] [DBIC] Took 0.00060916 seconds: SELECT me.id, me.host, me.instance, me.job_id, me.upload_progress, me.error, me.t_created, me.t_updated FROM workers me WHERE ( ( error IS NULL AND job_id IS NULL ) )
...

[codecov]

Codecov Report

Merging #2118 into master will decrease coverage by 13.84%.
The diff coverage is 41.17%.

@@             Coverage Diff             @@
##           master    #2118       +/-   ##
===========================================
- Coverage   83.37%   69.52%   -13.85%     
===========================================
  Files         170      146       -24     
  Lines       10638     9760      -878     
===========================================
- Hits         8869     6786     -2083     
- Misses       1769     2974     +1205

Impacted Files	Coverage Δ
lib/OpenQA/WebSockets.pm	88.4% <ø> (-0.17%)	⬇️
lib/OpenQA/Schema/Profiler.pm	40% <40%> (ø)
lib/OpenQA/Setup.pm	71.9% <50%> (-14.05%)	⬇️
lib/OpenQA/Git.pm	6.12% <0%> (-89.8%)	⬇️
lib/OpenQA/Parser/Result/Node.pm	14.28% <0%> (-85.72%)	⬇️
lib/OpenQA/Worker/Cache.pm	8.33% <0%> (-85.09%)	⬇️
lib/OpenQA/Parser/Result/OpenQA/Results.pm	20% <0%> (-80%)	⬇️
lib/OpenQA/Parser/Result/Test.pm	20% <0%> (-80%)	⬇️
lib/OpenQA/Parser/Result/OpenQA.pm	21.05% <0%> (-78.95%)	⬇️
lib/OpenQA/Parser.pm	21.69% <0%> (-78.31%)	⬇️
... and 104 more

---

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[codecov]

Codecov Report

Merging #2118 into master will increase coverage by 6.41%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master    #2118      +/-   ##
==========================================
+ Coverage   83.37%   89.78%   +6.41%     
==========================================
  Files         170      170              
  Lines       10638    10626      -12     
==========================================
+ Hits         8869     9541     +672     
+ Misses       1769     1085     -684

Impacted Files	Coverage Δ
lib/OpenQA/WebSockets.pm	94.2% <ø> (+5.63%)	⬆️
lib/OpenQA/Setup.pm	90.08% <100%> (+4.13%)	⬆️
lib/OpenQA/Schema/Profiler.pm	100% <100%> (ø)
lib/OpenQA/Worker/Commands.pm	81.17% <0%> (-2.36%)	⬇️
lib/OpenQA/Worker/Engines/isotovideo.pm	94.32% <0%> (+0.51%)	⬆️
lib/OpenQA/WebAPI.pm	97.15% <0%> (+0.71%)	⬆️
lib/OpenQA/WebAPI/Controller/LiveViewHandler.pm	96.46% <0%> (+1.32%)	⬆️
lib/OpenQA/WebAPI/Controller/API/V1/Job.pm	87.36% <0%> (+1.4%)	⬆️
lib/OpenQA/WebAPI/Controller/Running.pm	75.2% <0%> (+1.6%)	⬆️
... and 37 more

---

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Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 54be86e...fe41732. Read the comment docs.