Add: Same site cookie feature in python bindings

[harsha509]

Description

Adding sameSite Cookie feature to python bindings

Types of changes

• Bug fix (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 change)

Checklist

• I have read the contributing document.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing tests passed.

[harsha509]

There are failures in the build that doesn't relate to the feature implemented. I can see my tests are passing in

https://travis-ci.com/github/SeleniumHQ/selenium/jobs/298568890

Regards,
Harsha

[harsha509]

hi @AutomatedTester ,

Thanks for reviewing the PR. I have a request here, as this feature is currently available in chrome only (and still in progress in FF),is there any way that we can exclude tests in Firefox?

Thanks,
Harsha

[harsha509]

Hi @AutomatedTester ,

Apologies again. updated code with missing import