Created attachment 1151327 [details]
Tenants adding - that's how it should be

Description of problem:
In access control there are four subjects, that can be created: user,group,role,tenant.
User/group/role add behaves:
There are no required fields and add button is gray and unclickable only until there is something selected in all select boxes.
When you press Add and don't fill anything in required fields, you get alerted, that you didn't fill required fiels. You don't know, which fields are required, until you press that Add button.
Tenant add behaves:
You can see required fields in red border and under then sign, that they are required.
You can't press Add until all required fields are filled.

Version-Release number of selected component (if applicable):
5.6.0.4-beta2.3.20160421172650_719e256 

How reproducible:
100%

Steps to Reproduce:
1. Service->Configuration->Access control
2. Select Users/Groups/Roles and for Tenants->My company
3. Add a new user/role/group and for tenants Add child tenant to this tenant
Actual results:


Expected results:
Adding user/group/role same UI as for tenants to make it unified

Additional info:
Attached screenshots for all four situations