Created attachment 910812 [details]
validation of email address while assigning role to user.

Description of problem:
I created a user and without email-id. User was created successfully. Later I created a new role. But when I assigned the role to created user, the create user form pops-up with validation error along with "Email Address" text box 

"can't be blank"

Version-Release number of selected component (if applicable):
sat6 beta snap10

How reproducible:
always

Steps to Reproduce:
1. create a user without email id
2. create a role
3. assign role to user by editing user. 


Actual results:
validation error raised on UI while assigning role to user that email address can't be blank

Expected results:
No such error should be raised while assigning role to user instead if email-id is required then it should be validated while user creation only

Additional info: