fix: Valid content type for REST docker API requests with body

[manusa]

Description

fix: Valid content type for REST docker API requests with body

Relates to: #66 (#66 (comment))

Type of change

• Bug fix (non-breaking change which fixes an issue)
• Feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change
• Chore (non-breaking change which doesn't affect codebase;
  test, version modification, documentation, etc.)

Checklist

• I have read the contributing guidelines
• I signed-off my commit with a user that has signed the Eclipse Contributor Agreement
• I Added CHANGELOG entry
• I have implemented unit tests to cover my changes
• I have updated the documentation accordingly
• No new bugs, code smells, etc. in SonarCloud report
• I tested my code in Kubernetes
• I tested my code in OpenShift

[codecov]

Codecov Report

Merging #442 into master will increase coverage by 0.17%.
The diff coverage is 87.50%.

@@             Coverage Diff              @@
##             master     #442      +/-   ##
============================================
+ Coverage     36.93%   37.10%   +0.17%     
- Complexity     2415     2432      +17     
============================================
  Files           388      388              
  Lines         19097    19100       +3     
  Branches       2788     2790       +2     
============================================
+ Hits           7053     7087      +34     
+ Misses        11204    11171      -33     
- Partials        840      842       +2     

Impacted Files	Coverage Δ	Complexity Δ
...ice/docker/access/hc/ApacheHttpClientDelegate.java	50.72% <87.50%> (+49.20%)	17.00 <2.00> (+17.00)

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[sonarcloud]

Kudos, SonarCloud Quality Gate passed!

0 Bugs
0 Vulnerabilities (and 0 Security Hotspots to review)
0 Code Smells

92.3% Coverage
0.0% Duplication

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