(@wdio/cucumber-framework): disable parallel execution and warn user that this feature is not supported

[christian-bromann]

Proposed changes

Disable the parallel execution of Cucumber as it is currently not supported.

refs #11078

Types of changes

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update

Checklist

• I have read the CONTRIBUTING doc
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)
• I have added proper type definitions for new commands (if appropriate)

Further comments

I wonder if we should rather fail the test run instead of just printing a warning in the logs that might could get overseen.

Reviewers: @webdriverio/project-committers

[christian-bromann]

@tamil777selvan what do you think is the better option here:

• forcing the parallel option to be 0 and print a warning message (which might can get overseen by the user)
• throwing an error if parallel option is being used

I am tending towards the second.

[tamil777selvan]

@tamil777selvan what do you think is the better option here:

• forcing the parallel option to be 0 and print a warning message (which might can get overseen by the user)
• throwing an error if parallel option is being used

I am tending towards the second.

Hi @christian-bromann Second option, sounds good to me.