ContainerHandler : Return empty collection instead of null

[rohanKanojia]

Component

JKube Kit

Task description

Description

ContainerHandler seems to be returning a null value in a method with a list return type:

https://github.com/eclipse/jkube/blob/c4ee9d4e9432297c50d9385a8c06d1fea0f75e3a/jkube-kit/enricher/api/src/main/java/org/eclipse/jkube/kit/enricher/handler/ContainerHandler.java#L184

Sonar flags this as a code smell. We should replace this with Collections.emptyList().

Expectations would also need to be updated in ContainerHandlerTest

Expected Behavior

ContainerHandler.getContainerPorts is updated to return a non null value

Acceptance Criteria

• ContainerHandler.getContainerPorts is updated to return a non null value
• Project compiles successfully after running mvn clean install