[BUG] Cannot login as supervisor user

[lisavogtsf]

What's the bug?
Attempting to login as the seeded "supervisor user," email: supervisor1@example.com, gets an "unrecognized role" error.

Need to set up proper scope for a supervisor user in devise policies/scope--what permissions apply to this user?
Supervisors can only access data associated with the following

• volunteers assigned to them, regardless of case assignment status (view and edit)
• case_contacts associated with a supervisor's volunteer assignments (view and edit)
• casa_cases associated with a supervisor's volunteer assignments (view and edit)
• volunteer and case assignments (view and edit)
• generate reports (need more details)

Need to add a test to ensure this doesn't happen in the future.

How to make it happen
Steps to reproduce the behavior:

1. As a logged out user
2. Go to the home page/login page
3. Enter valid email and password from db seed.rb file
4. See runtime error: unrecognized role (screenshot below)

Screenshots

Extra info:
Error cites user_policy.rb line 25, that file only recognizes 'casa_admin' and 'volunteer' as valid roles

relates to issues
#30

[Zrrrpy]

@compwron has this fix pushed to staging? I'm still getting an error when I try to log in as a supervisor using supervisor1@example.com