refactored L::Utils::get_yaml to only require args needed for construction of path/to/yaml_dir/filename to remove duplication from components requiring a get_yaml_file() method (Controllers, Model & ScriptHelpers)
bugfix - failure to update request_result_summary timestamp col on result_summary update causing premature locking of records; action logged in request history when request status set to complete by incomplete_requests.pl or M::R::RequestUpdate::update_request_status; adapted incomplete_requests.pl to include status complete requests with diagnosis awaiting final diagnosis/review; ScriptHelpers::do_request_history renamed to log_diagnosis_alert to avoid conflict with M::R::HistoryAction method of same name; nav bar loads HMRN link if user has either view_outreach_data or edit_outreach_data permissions; L::Role::DiagnosisConfirm::diagnosis_confirmation_required hash of lab_sections renamed from %map to %required for clarity
