S: As an Admin ISBAT manage roles

- AC: must have a name
- AC: name is unique, regardless of case
S: As an Admin ISBAT manage user roles

- AC: users can have multiple roles
Merge pull request #8 from BM5k/stories/6032

S: As an Admin ISBAT manage roles
Merge pull request #9 from BM5k/stories/6033

S: As an Admin ISBAT manage user roles