Fix org visibility bug when git cloning (#6743)

* fix org visibility bug

* fix permission check

* add integration tests

* fix tests

* change test user name for easier maintainance and fix test

* fix test git repo name

routers/api/v1/api.go

@@ -150,6 +150,7 @@ func repoAssignment() macaron.Handler {
 			}
 			return
 		}
+
 		repo.Owner = owner
 		ctx.Repo.Repository = repo