Add a tag when scenario used invalid/unknown severities

[dktsni]

Add a tag when scenario used invalid/unknown severities

Context

Currently, the scenario which use an unknown severity (like ihghinstead of high) are marked with the flag No Severity.

Expected

Scenario with invalid/unknown severities or countries should show in executions (with the same CSS as the No Severity) with the label Wrong Severity! (or Wrong Country!).