fix test for 2x

Author: igorcoding

tests/test_common.py

@@ -228,7 +228,8 @@ async def func():
         # Changing scheme
         try:
             conn = await asynctnt.connect(host=self.tnt.host,
-                                          port=self.tnt.port)
+                                          port=self.tnt.port,
+                                          username='t1', password='t1')
             async with conn:
                 await conn.eval(
                     "s = box.schema.create_space('spacex');"