Improve test coverage for FlowContentItem
Improve test coverage for FlowContentItem

In preparation for introducing a StartPageContentItem.

aledelcueto/smart-answers,alphagov/smart-answers,alphagov/smart-answers,aledelcueto/smart-answers,aledelcueto/smart-answers,alphagov/smart-answers,alphagov/smart-answers,aledelcueto/smart-answers