[#61558718] ContactsModuleImport#rollback
[#61558718] ContactsImportModule checks before rollback

- failed?
- rollbacked?
[#61558718] checks before rollback
[#61558718] new controller action, imports#rollback
[#61558718] link to rollback
[#61558718] change mock x double
[#61558718] update spec to method behaviour