Constant string `testOwnerID` for these tests has an invalid
format. It has 11 bytes instead of required 25 for `user.ID`.
It worked because:
  1. `user.ID` was a byte slice and didn't check length
     and format of byte slices decoded from strings.
  2. in these tests `testOwnerID` was used only to decode
     container owner id and to compare it with owner id encoded
     back to string.
Since `user.ID implementation has changed`, the problem arised.
Now `testOwnerID` is valid.

Signed-off-by: Ekaterina Lebedeva <ekaterina.lebedeva@yadro.com>

@@ -20,3 +20,3 @@
 
 const (
-	testOwnerID = "FPPtmAi9TCX329"
+	testOwnerID = "NURFM8PWbLA2aLt2vrD8q4FyfAdgESwM8y"