UI tests failing for blog posts which are not release related

[bartoszmajsak]

We have blog posts which are not relese-related, eg #410. However our test suite verifies if each and every blog post has release notes, regardless of its type. This results in errors such as

Missing release notes for blog post titled: End-To-End Integration Testing For Kubernetes/OpenShift.

Proposed solution

Before doing a release notes verification check if the blog post is an actual release post. This can be done by checking if it was tagged with release, e.g.