Fix iOS Private Browsing / Chrome Icognito Error

Updated the support tests due to iOS and Chrome throwing errors when using set/get when in private browsing mode.

Currently iOS/Chrome will pass the support test but no data will be stored.

This change forces cookie usage for those modes stopping the failure.
Merge pull request #13 from uksitebuilder/patch-1

Fix iOS Private Browsing / Chrome Icognito Error