Refactor Issues Subscription (#8738)

* FIX: getIssueWatchers() get only aktive suscriber

* save query to work later with it or not ...

* fix test + add new case

* corect tests + GetIssueWatch

* API issue_subscripton: Put/Delete require tocken

* remove redundant code

* swagger specify return value

* remove unused binding

* remove note
because I'll implement this in a different way and in another PR

* ID should be unique!

* use xorm session

* Revert "use xorm session"

This reverts commit c1de540147199f2f1a8dd0d008f54af3603e2229.

* better test code
* more acurate comments
* use assert.False/True instead of Equal

* use more assert methodes

routers/api/v1/api.go

@@ -691,9 +691,9 @@ func RegisterRoutes(m *macaron.Macaron) {
 							m.Post("/stop", reqToken(), repo.StopIssueStopwatch)
 						})
 						m.Group("/subscriptions", func() {
-							m.Get("", bind(api.User{}), repo.GetIssueSubscribers)
-							m.Put("/:user", repo.AddIssueSubscription)
-							m.Delete("/:user", repo.DelIssueSubscription)
+							m.Get("", repo.GetIssueSubscribers)
+							m.Put("/:user", reqToken(), repo.AddIssueSubscription)
+							m.Delete("/:user", reqToken(), repo.DelIssueSubscription)
 						})
 					})
 				}, mustEnableIssuesOrPulls)