[stable10] Send OCM requests as JSON

[VicDeo]

Backport of #34321

Description

OCM spec says that POST body should be JSON
https://rawgit.com/GEANT/OCM-API/v1/docs.html

Motivation and Context

How Has This Been Tested?

By creating federated shares between this branch and stable10 and sniffing the traffic with Wireshark

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

[PVince81]

👍

[codecov]

Codecov Report

Merging #34424 into stable10 will not change coverage.
The diff coverage is n/a.

@@             Coverage Diff             @@
##             stable10   #34424   +/-   ##
===========================================
  Coverage        63.5%    63.5%           
  Complexity      19140    19140           
===========================================
  Files            1265     1265           
  Lines           75296    75296           
  Branches         1291     1291           
===========================================
  Hits            47813    47813           
  Misses          27103    27103           
  Partials          380      380

Flag	Coverage Δ	Complexity Δ
#javascript	53.32% <ø> (ø)	0 <ø> (ø)	⬇️
#phpunit	64.59% <ø> (ø)	19140 <ø> (ø)	⬇️

Impacted Files	Coverage Δ	Complexity Δ
apps/federatedfilesharing/lib/Notifications.php	11.53% <ø> (ø)	3 <0> (ø)	⬇️

---

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Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
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[codecov]

Codecov Report

Merging #34424 into stable10 will not change coverage.
The diff coverage is n/a.

@@             Coverage Diff             @@
##             stable10   #34424   +/-   ##
===========================================
  Coverage        63.5%    63.5%           
  Complexity      19140    19140           
===========================================
  Files            1265     1265           
  Lines           75296    75296           
  Branches         1291     1291           
===========================================
  Hits            47813    47813           
  Misses          27103    27103           
  Partials          380      380

Flag	Coverage Δ	Complexity Δ
#javascript	53.32% <ø> (ø)	0 <ø> (ø)	⬇️
#phpunit	64.59% <ø> (ø)	19140 <ø> (ø)	⬇️

Impacted Files	Coverage Δ	Complexity Δ
apps/federatedfilesharing/lib/Notifications.php	11.53% <ø> (ø)	3 <0> (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 b0e972d...575c90b. Read the comment docs.