57723366 Ensure that RoleReader in the default context is assigned to
anyone who is assigned read permission for UserRole in some context.
Get rid of debugger statement.
Merge branch 'develop' into feature/basic-roles-should-be-readable
Merge remote-tracking branch 'origin/develop' into feature/basic-roles-should-be-readable

* Update migration's `down_revision` to avoid migration branch
Merge pull request #440 from reciprocity/feature/basic-roles-should-be-readable

57723366 Ensure that RoleReader in the default context is assigned to anyone