Non json resteasy reactive

[jcarranzan]

Summary

Create test cases that evolve non-JSON payload in REST endpoints as described in the Jira task:
https://issues.redhat.com/browse/QQE-343

1. XML scenario:
   Scenario: Verify that the endpoint properly consumes and produces XML payloads.

• Check the endpoint that returns a valid XML.
• Send a request with an XML payload to the endpoint.
• Validate the response.
• Ensure the response's content matches the expected from the XML structure.

2. YAML scenario

• Check the endpoint that returns a Yaml from a Yaml file.
• Send a request with a Yaml payload from a file to an endpoint.
• Validate the response
• Ensure the response's content matches the expected from the YAML content.

3. Image scenario

• Verify the endpoint that returns an image by making a GET request.
• Send Image in Multipart Form
• Check the endpoint that handles image upload as part of a multipart form by making a POST request.

Please select the relevant options.

• Bug fix (non-breaking change which fixes an issue)
• Dependency update
• Refactoring
• Backport
• New scenario (non-breaking change which adds functionality)
• This change requires a documentation update
• This change requires execution against OCP (use run tests phrase in comment)

Checklist:

• Methods and classes used in PR scenarios are meaningful
• Commits are well encapsulated and follow the best practices

[mjurc]

Are you planning to add the image payload test too btw?

[jcarranzan]

Are you planning to add the image payload test too btw?

Yes, I will push it today if there are no setbacks.

[michalvavrik]

LGTM if you can answer well my comment, thanks

[mjurc]

@jcarranzan thanks for the coverage, code LGTM, but please squash the commits and update the commit message to be more helpful