Cookie has Secure & HttpOnly flags and a domain set.

[#78457654]
Merge pull request #38 from ministryofjustice/cookie-scoping-78457654

Cookie has Secure & HttpOnly flags and a domain set.
Correct site links for Live launch

* Update GOV.UK template
* Remove Beta banner/colours
* Terms and conditions
* Remove Welsh link
* Remove Help link
* Correct Cookie link

Finishes #78363302 #78363422 #78363182 #78363034
Rename service to "Visit someone in prison"
Remove progress bar

Finishes #75354824
Redirect to start page