[#79361732] default ad-hoc to admin role if not set
[#79361732] set default role to name of role, not kind
[#79361732] Add default author role, pending discussion
[#79361732] remove author role and default to admin if no default role
schema version
[#79361732] add spec to reflect default admin role
[#79361732] go back to using role kind instead of role name
Merge pull request #451 from Tahi-project/default-roles

Default roles