Since the denmark stream stub has subscribed = true,
we include the current user id in it's subscribers set.
We remove user `me` from sweden stream stub for the same
reason.
This fixes the regression introduced in the pervious
commit to regain the 100% line coverage in `user_pill.js`
as well as `stream_pill.js`.
The new `stream_edit.js` mainly tests for:
* The stream related queries of the typeahead in `user_pill.js`
* The "Add subscribers" event handlers.
* The event handler which displays the settings for a stream.