Resolve "Ops Dashboard intermittent dashboard component karma failure"

What does this MR do?

Corrects flaky operations dashboard karma tests for the dashboard.vue component

What are the relevant issue numbers?

Closes #8265 (closed)

Does this MR meet the acceptance criteria?

• Tests added for this feature/bug
• Conforms to the code review guidelines
• Conforms to the merge request performance guidelines
• Conforms to the style guides
• EE specific content should be in the top level /ee folder