[stable10] Log exception when background job class not found

[phil-davis]

Backport #32623

@PVince81 I found this backport branch already here, but there did not seem to be a PR. So I have rebased and started this backport PR.

[phil-davis]

https://drone.owncloud.com/owncloud/core/15888/92

PHPUnit 5.7.27 by Sebastian Bergmann and contributors.

Runtime:       PHP 5.6.38-3+ubuntu16.04.1+deb.sury.org+1
Configuration: /drone/src/tests/phpunit-autotest.xml
Error:         No code coverage driver is available

........S....................................................   61 / 5109 (  1%)
.............................................................  122 / 5109 (  2%)
PHP Fatal error: Call to undefined method OC\BackgroundJob\JobList::listJobs() in /drone/src/tests/lib/BackgroundJob/JobListTest.php on line 268

listJobs() is added by https://github.com/owncloud/core/pull/31630/files#diff-682d0340741ed685e9e7427318d97521R329 and that PR has not yet been backported. So it seems that this backport will also be blocked.

@PVince81 @DeepDiver1975 ?

[codecov]

Codecov Report

Merging #34723 into stable10 will increase coverage by 14.38%.
The diff coverage is n/a.

@@              Coverage Diff              @@
##           stable10   #34723       +/-   ##
=============================================
+ Coverage     30.64%   45.03%   +14.38%     
=============================================
  Files            53      116       +63     
  Lines          4160    11465     +7305     
  Branches          0     1291     +1291     
=============================================
+ Hits           1275     5163     +3888     
- Misses         2885     5923     +3038     
- Partials          0      379      +379

Flag	Coverage Δ
#javascript	53.22% <ø> (?)
#phpunit	30.64% <ø> (ø)	⬆️

Impacted Files	Coverage Δ
core/js/oc-dialogs.js	2.66% <0%> (ø)
core/js/oc-backbone.js	50% <0%> (ø)
settings/js/admin-apps.js	6.46% <0%> (ø)
core/js/config.js	3.33% <0%> (ø)
core/js/sharemodel.js	63.63% <0%> (ø)
core/js/files/client.js	82.84% <0%> (ø)
core/js/l10n.js	90.54% <0%> (ø)
core/js/js.js	55.05% <0%> (ø)
core/js/systemtags/systemtags.js	90% <0%> (ø)
apps/comments/js/commentcollection.js	72.72% <0%> (ø)
... and 53 more

---

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[codecov]

Codecov Report

Merging #34723 into stable10 will increase coverage by 0.01%.
The diff coverage is 100%.

@@              Coverage Diff               @@
##             stable10   #34723      +/-   ##
==============================================
+ Coverage       64.27%   64.29%   +0.01%     
  Complexity      20010    20010              
==============================================
  Files            1283     1283              
  Lines           76694    76697       +3     
  Branches         1307     1307              
==============================================
+ Hits            49298    49310      +12     
+ Misses          27015    27006       -9     
  Partials          381      381

Flag	Coverage Δ	Complexity Δ
#javascript	53.01% <ø> (ø)	0 <ø> (ø)	⬇️
#phpunit	65.49% <100%> (+0.01%)	20010 <1> (ø)	⬇️

Impacted Files	Coverage Δ	Complexity Δ
lib/private/legacy/app.php	62.13% <ø> (ø)	174 <0> (ø)	⬇️
lib/private/Server.php	86.54% <100%> (+0.01%)	253 <0> (ø)	⬇️
lib/private/BackgroundJob/JobList.php	80.26% <100%> (+6.26%)	33 <1> (ø)	⬇️

---

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[phil-davis]

Commit from other backport PR #34783 has been added here, because this backport is dependent on that commit getting in first/also.

So this PR is blocked because #34783 is blocked. See comment #31630 (comment)

[phil-davis]

@PVince81 this is ready for approval after #34783 is merged.

[PVince81]

rebased and adjusted "since" version to say 10.2.0

[phil-davis]

@PVince81 CI is green. I can't review, because it is my PR.

[phil-davis]

rebased and adjusted "since" version to say 10.2.0

"since" PHPdoc changes forward-ported to master in #34994