[HR] clean model in a changes the hr_applicant model in add the _content_serach method and hr_contract models in add the xml id on the serach and remove _resolve_department_id_from_context method in hr_recruitment model.and add a method _broadcast_welcome hr_recuriemnt model.
[IMP] HR clean model in a changes the hr_applicant model in add the _content_serach method  and Remove everything related to context('mail_broadcast') and hr.employee and hr_department in remove _check_recursion method,instead of use osv.osv.check_recursion.hr_holidays in override create() in hr_employee change set_remaining_days. hr_contract models in add the xml id on the serach and add a method _broadcast_welcome hr_recuriemnt model.