Description of problem:

Looking for node details via UI will end with error
horizon:infrastructure:nodes:detail


Version-Release number of selected component (if applicable):


How reproducible:


Steps to Reproduce:
1. login to UI
2. Nodes-> select a node -> look for details 
3.

Actual results:

it works in CLI

[stack@puma42 ~]$ ironic node-list
+--------------------------------------+------+--------------------------------------+-------------+-----------------+-------------+
| UUID                                 | Name | Instance UUID                        | Power State | Provision State | Maintenance |
+--------------------------------------+------+--------------------------------------+-------------+-----------------+-------------+
| 6b76bd28-6e6e-4c3e-baa1-2c59f54f33e6 | None | 32226ca1-a5fe-41d6-958a-4c18ffc59347 | power on    | active          | False       |
| 5f91a723-25fc-4363-8fc2-6de868330f9d | None | e91b5a84-86da-41e5-8310-b4ca4490ab9d | power on    | active          | False       |
+--------------------------------------+------+--------------------------------------+-------------+-----------------+-------------+
[stack@puma42 ~]$ ironic node-show 5f91a723-25fc-4363-8fc2-6de868330f9d
+------------------------+--------------------------------------------------------------------------+
| Property               | Value                                                                    |
+------------------------+--------------------------------------------------------------------------+
| target_power_state     | None                                                                     |
| extra                  | {u'

Expected results:

should work in UI as well 

Additional info: