Fuyaql is broken for 9.1 release

Current 9.1 ISO (got this on 9.0 upgraded to 9.1 with proposed-2016-09-17-040338 snapshot).

For current 9.1 release we cannot debug fuyaql anymore:

[root@nailgun etc]# manage.py yaql
2016-09-23 10:33:18.535 DEBUG [7f2000e5c740] (settings) Looking for settings.yaml package config using old style __file__
2016-09-23 10:33:18.535 DEBUG [7f2000e5c740] (settings) Trying to read config file /usr/lib/python2.7/site-packages/nailgun/settings.yaml
2016-09-23 10:33:18.821 DEBUG [7f2000e5c740] (settings) Trying to read config file /etc/nailgun/settings.yaml
fuel-yaql> :show clusters
id | name | status
---------------------------
1 | test | error
fuel-yaql> :use cluster 1
/usr/lib64/python2.7/site-packages/sqlalchemy/sql/compiler.py:575: SAWarning: Can't resolve label reference '-id'; converting to text() (this warning may be suppressed after 10 occurrences)
  util.ellipses_string(element.element))
fuel-yaql> :show tasks
id | status
------------------
6 | error
fuel-yaql> :use task1 6
fuel-yaql> :use task2 6
fuel-yaql> :show nodes
uid | status | roles
-----------------------------
Unexpected error: 'uid'
Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/nailgun/fuyaql/fuyaql.py", line 324, in run_loop
    r = self.execute_command(command)
  File "/usr/lib/python2.7/site-packages/nailgun/fuyaql/fuyaql.py", line 305, in execute_command
    return f(*args)
  File "/usr/lib/python2.7/site-packages/nailgun/fuyaql/fuyaql.py", line 233, in show_nodes
    lambda x: node_ids.index(x['uid'])
  File "/usr/lib/python2.7/site-packages/nailgun/fuyaql/fuyaql.py", line 380, in print_list
    print('*' * (get_selected_index(column) + 1), end=' ')
  File "/usr/lib/python2.7/site-packages/nailgun/fuyaql/fuyaql.py", line 233, in <lambda>
    lambda x: node_ids.index(x['uid'])
KeyError: 'uid'
fuel-yaql>

It lead us to inability of troubleshooting problems related to YAQL extensions in cluster.

How to reproduce:
1. Install Fuel 9.1 master node
2. Create cluster
3. Add nodes to cluster
4. Deploy
5. Try to get nodes list from fuyaql cli (called by 'manage.py yaql' on master node)

Expected: it works
Actual: it fails with python traceback