chore: fix contentType check in post and put

[tiwarishubham635]

Fixes

Earlier, we were setting contentType in curl client. So if contenttype is pre-set, it meant application/json. Since we are presetting each header now, we have corrected the check.

Checklist

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[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
100.0% Coverage on New Code
0.0% Duplication on New Code

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