Fix races / finally remove global app for good (#7570)

* finally remove global app for good

* test compilation fixes

* fix races

* fix deadlock

* wake up write pump so it doesn't take forever to clean up

app/authorization_test.go

@@ -10,8 +10,6 @@ import (
 )
 
 func TestCheckIfRolesGrantPermission(t *testing.T) {
-	Setup()
-
 	cases := []struct {
 		roles        []string
 		permissionId string