CAMEL-21935: Fix Knative Service missing container image on OpenShift

[davsclaus]

Summary

• Fix Knative Service manifest getting a bare image name (e.g., http-log:1.0-SNAPSHOT) instead of the full registry URL when deploying to OpenShift with --trait knative-service.enabled=true
• Root cause: commit 089356d392b5 (CAMEL-21903) stopped setting the container image on the Container trait, only setting JKube build properties. This works for Deployments (JKube reads the properties), but breaks Knative Services (generated entirely by traits code, not JKube)

Root Cause

TraitHelper.configureContainerImage() sets jkube.image.name and jkube.container-image.name as Maven build properties but no longer calls containerTrait.setImage(imageToUse). Since ContainerTrait.apply() only sets the image on the container when containerTrait.getImage() is not empty, the Knative Service ends up with no image reference — Knative then resolves the bare artifact name against Docker Hub and fails with 401 Unauthorized.

Fix

Re-add containerTrait.setImage(imageToUse) in TraitHelper.configureContainerImage() so both Deployments and Knative Services get the correct image. The JKube build properties remain as-is for Maven CI/CD overridability.

Test plan

• Updated all KubernetesExportTest assertions from assertNull(container.getImage()) to expect the correct image value
• All existing tests pass

Claude Code on behalf of Claus Ibsen

[github-actions]

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[github-actions]

🧪 CI tested the following changed modules:

• dsl/camel-jbang/camel-jbang-plugin-kubernetes

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• dsl/camel-jbang/camel-jbang-plugin-kubernetes: 8 test(s) disabled on GitHub Actions

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mvn verify -f dsl/camel-jbang/camel-jbang-it -Djbang-it-test

All tested modules (2 modules)

• Camel :: JBang :: Plugin :: Kubernetes
• Camel :: Launcher :: Container

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