Fix scoped_search deprecations
|Assigned To:||Daniel Lobato Garcia|
|Target version:||Foreman - Team Daniel - Iteration 9|
|Found in release:||Pull request:||https://github.com/theforeman/foreman-tasks/pull/230|
|Velocity based estimate||-|
The 'in' argument in scoped_search definitions is deprecated and could be removed anytime, it should be substituted by 'relation'