Created attachment 1147491 [details]
Unable to delete the role

Description of problem:
Cannot delete user role once it was associated with a user group

Version-Release number of selected component (if applicable):
5.6.0.1-beta2.20160413141124_e25ac0e

How reproducible:
100%

Steps to Reproduce:
1. Create a new user role
2. Create new user group and have it use the above created role
3. Try to delete the above created user role. This will correctly throw an error, because the role is linked to the above created group via entitlements table.
3. Delete the above created group
4. Now, try to delete the above user role. 

Actual results:
Throws error message stating "Role "<role-name>": Error during delete: Cannot delete record because of dependent entitlements".

Note:
After this, you can no longer delete the user role. (even if we logout and login again)

Expected results:
Should be able to delete the role

Additional info:
evm.log:
========
[----] E, [2016-04-15T03:42:38.782328 #3051:f6c5fc] ERROR -- : MIQ(ops_controller-x_button): Role "ramesh-role": Error during delete: Cannot delete record because of dependent entitlements