Expose executionrequest in Admin

[mattiagiupponi]

Is your feature request related to a problem? Please describe. It might happen that is required to stop manually an execution request and at the moment is possible only via API or via Shell

Describe the solution you'd like Expose the execution request molded in the django-admin page and make the status customizable with the available choices, the rest can be shown in read-only mode

CC @marthamareal