`req.reply()` was not returning an empty response, it was returning the
actual response from the server. this led to the "loading" state being
present momentarily before the actual response was returned. we are now
forcing the loading state to remain, as the mock intends.

made the cypress config file more dynamic. it also will allow us to
correctly intercept api calls in our `customApiIntercept` command.

update the "featured services list is loading" test check that we in
fact have 3 placeholder items, as the description states.

changed up the specs to fit the flow of the home page. also moving two
specs from the browse page to the home page since that's where the
requests originate from.

although we were catching the error in `#fetcher`, we weren't returning
it as an error. it was being returned to the caller as the `data` value.
this means none of our `isError` checks for GET requests were working
properly.
with this commit, we're throwing the error so that we are handling it
on the view correctly.

we're testing for an invalid access token now.
the `customApiIntercept` command is also simplified.

also further simplified the `customApiIntercept` function.