Fix fixture property names that caused the account tests to fail

[Vinai]

I'm not sure how this happened, my guess is that at one point the data in cypress/fixtures/account.json was changed, but the references to the street and the house number in cypress/page-objects/hyva/account.js where not updated.

The old property names are used nowhere else within the repo, so I think it's safe to assume the luma tests where refactored, too, if they used them.

I'm too lazy to git-blame to try and figure out when that happened :)

[peterjaap]

Sorry my bad! I had to split the address up in street + housenumber for a specific project. Then I made another update to the fixture file, and made a PR here but copied this along. Thanks for flagging & fixing.