Fixed tests file to adher to havana internal api #11
Propagate VO name as a tenant role. Optionally add swiftoperator role #11
Made the name of the role for swift access configurable
Improved the role management.
Do not use a set.
Added tests for role addition.
Set add_roles as False by default.
Use fixtures for the tenant name/id.
Merge branch 'livenson-extended-roles' into stable/havana