D-Net

We need a dedicated template for transformation, as the input is not anymore the native mdstore, but the validated mdstore.
Added placeholder for the xslt that takes the validation result and put it in our records for the transformator.
Updated params to pass to the ValidatorService BB job.

fixed xml

Changed BB params according to specs in #538

Validator-related nodes moved here from mincyt workflows

basic files for workflows including validator as a step

Creating new module for validator job nodes and co.