[test] Run webUISharingExternal suite 20 times to see how often it fails (short)

[phil-davis]

and shorten the webUISharingExternal suite to see if the scenarios fail when run by themselves.

Issue #34186

[codecov]

Codecov Report

Merging #34189 into master will decrease coverage by 11.66%.
The diff coverage is n/a.

@@              Coverage Diff              @@
##             master   #34189       +/-   ##
=============================================
- Coverage     64.76%   53.09%   -11.67%     
=============================================
  Files          1198       61     -1137     
  Lines         69467     7217    -62250     
  Branches       1281     1281               
=============================================
- Hits          44989     3832    -41157     
+ Misses        24105     3012    -21093     
  Partials        373      373

Flag	Coverage Δ	Complexity Δ
#javascript	53.09% <ø> (ø)	0 <ø> (ø)	⬇️
#phpunit	?	?

Impacted Files	Coverage Δ	Complexity Δ
apps/updatenotification/templates/admin.php
lib/private/Encryption/Keys/Storage.php
lib/private/App/CodeChecker/NodeVisitor.php
lib/private/RedisFactory.php
apps/dav/lib/Avatars/AvatarNode.php
...s/dav/appinfo/Migrations/Version20170202213905.php
apps/dav/lib/Upload/ChunkLocationProvider.php
apps/files/lib/AppInfo/Application.php
apps/systemtags/list.php
apps/files_external/lib/Lib/Backend/DAV.php
... and 1127 more

---

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Δ = absolute <relative> (impact), ø = not affected, ? = missing data
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[codecov]

Codecov Report

Merging #34189 into master will decrease coverage by 11.66%.
The diff coverage is n/a.

@@              Coverage Diff              @@
##             master   #34189       +/-   ##
=============================================
- Coverage     64.76%   53.09%   -11.67%     
=============================================
  Files          1198       61     -1137     
  Lines         69467     7217    -62250     
  Branches       1281     1281               
=============================================
- Hits          44989     3832    -41157     
+ Misses        24105     3012    -21093     
  Partials        373      373

Flag	Coverage Δ	Complexity Δ
#javascript	53.09% <ø> (ø)	0 <ø> (ø)	⬇️
#phpunit	?	?

Impacted Files	Coverage Δ	Complexity Δ
apps/updatenotification/templates/admin.php
lib/private/Encryption/Keys/Storage.php
lib/private/App/CodeChecker/NodeVisitor.php
lib/private/RedisFactory.php
apps/dav/lib/Avatars/AvatarNode.php
...s/dav/appinfo/Migrations/Version20170202213905.php
apps/dav/lib/Upload/ChunkLocationProvider.php
apps/files/lib/AppInfo/Application.php
apps/systemtags/list.php
apps/files_external/lib/Lib/Backend/DAV.php
... and 1127 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 3515439...1bd9851. Read the comment docs.

[phil-davis]

The tests pass 100 times! I cannot reproduce the fails that happened on some PRs last week.