Only admins are allowed to add packages
Don't be silly, we can only add packages one at a time (but maybe for multiple collections)
More add_package tests

- Test exceptions
- Test adding a package for a group
- Remote adding multiple packages at once since they would have different names but
everything else would be the same...
Fix authorization check in set_acl_package for setting acls for a group
More set_acl_package tests

- Document what the checks are doing
- Increase coverage
Fix variable name
More unit-tests for pkg_change_poc

- Handle groups
- Check status change after a package has been un-orphaned