DemoCookies() waits on NID cookie existence

[mlipok]

Pull request

Proposed changes

NID cookie may not exist at start, may appear later when website will be estabilished, so there is need to wait on @error and try again

Checklist

• I have read and noticed the CODE OF CONDUCT document
• I have read and noticed the CONTRIBUTING document
• I have added necessary documentation or screenshots (if appropriate)

Types of changes

Please check x the type of change your PR introduces:

• Bugfix (change which fixes an issue)
• Feature (change which adds functionality)
• Code style update (formatting, renaming)
• Refactoring (functional, structural)
• Documentation content changes
• Other (please describe)

What is the current behavior?

NID may not exist after even after _WD_LoadWait

What is the new behavior?

DemoCookies() waits on NID cookie existence

Additional context

wd_demo: review all "Demo****" function

System under test

not related

[Danp2]

Please add a way for this loop to exit after some period of time so that the script doesn't loop forever in the event that the cookie never "appears".