[tests-only] check HTTP status code in favorite tests

[individual-it]

Description

check the HTTP status code

Motivation and Context

when testing OCIS with EOS, the status is 500, but I had to debug first to find it out, better the tests would tell me directly

How Has This Been Tested?

owncloud/ocis#321
owncloud/ocis-reva#277

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Database schema changes (next release will require increase of minor version instead of patch)
• Breaking change (fix or feature that would cause existing functionality to change)
• Technical debt
• Tests only (no source changes)

Checklist:

• Code changes
• Unit tests added
• Acceptance tests added
• Documentation ticket raised:
• Changelog item, see TEMPLATE

[codecov]

Codecov Report

Merging #37543 into master will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master   #37543   +/-   ##
=========================================
  Coverage     64.67%   64.67%           
  Complexity    19339    19339           
=========================================
  Files          1279     1279           
  Lines         75573    75573           
  Branches       1331     1331           
=========================================
  Hits          48880    48880           
  Misses        26301    26301           
  Partials        392      392           

Flag	Coverage Δ	Complexity Δ
#javascript	54.14% <ø> (ø)	0.00 <ø> (ø)
#phpunit	65.84% <ø> (ø)	19339.00 <ø> (ø)

---

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 05bf8c8...c9dcff5. Read the comment docs.