[REFACTORING] Service to src + clean core

core/Models/ValidatorModel.php

core/Test/ContactControllerTest.php

modules/convert/Models/ProcessConvertModelAbstract.php

modules/convert/Models/ProcessFulltextModelAbstract.php

modules/convert/Models/ProcessThumbnailsModelAbstract.php

modules/visa/Controllers/VisaController.php

modules/visa/Models/VisaModelAbstract.php

phpunit.xml

src/app/action/controllers/ActionController.php

src/app/attachment/models/AttachmentModelAbstract.php

src/app/basket/controllers/BasketController.php

src/app/docserver/controllers/DocserverController.php

src/app/docserver/controllers/DocserverTypeController.php

src/app/doctype/controllers/DoctypeController.php

src/app/doctype/controllers/FirstLevelController.php

src/app/doctype/controllers/SecondLevelController.php

src/app/entity/controllers/EntityController.php

src/app/entity/controllers/ListTemplateController.php

src/app/group/controllers/GroupController.php

src/app/group/models/GroupModelAbstract.php