Comment 5 for bug 1576881

so actually instance is in error state:
root@node-1:~# nova list
+--------------------------------------+-----------------+--------+------------+-------------+----------+
| ID | Name | Status | Task State | Power State | Networks |
+--------------------------------------+-----------------+--------+------------+-------------+----------+
| a3eb1b19-b395-46ce-961d-54c4c8ae1ad1 | ironic-slave-01 | ERROR | - | NOSTATE | |

So at least we should make improvement in tests waiter like if instance in error state - stop to wait for Active and fail