Case C-437/17: Judgment of the Court (Fifth Chamber) of 13 March 2019 (request for a preliminary ruling from the Oberster Gerichtshof — Austria) — Gemeinsamer Betriebsrat EurothermenResort Bad Schallerbach GmbH v EurothermenResort Bad Schallerbach GmbH (Reference for a preliminary ruling — Free movement of workers — Article 45 TFEU — Regulation (EU) No 492/2011 — Article 7(1) — Prohibition of discrimination on grounds of nationality — Right to paid annual leave based on the seniority of the worker with the employer — Account taken only in part of previous periods of service completed with other employers — Social law — Disparity between the schemes and legislation of the Member States)