Schema validation is not linked to the actor

During actor schema validation, the actor is not involved.

The actor is only created at the actor execution, but contains important information that can be feed from the yml file

Here is an example

  - actor: zseries_inplace_tomo3
    implementor: daiquiri.implementors.tomo.zseriesscan
    config:
       # name of the BLISS object holding the fullfield parameters (FullFieldTomo)
       zseries_object: zseries3

As result it is not possible to me to compute time_estimate from what i get from the form.

• One could inject somehow the config of the actor into the schema
• One could rework the life cycle of an actor to let it reachable during the form validation
  • From that we could call time_execution from the actor
  • Or link the actor to the schema