Sean Quinn junior, the son of the former billionaire industrialist Sean Quinn, is no stranger to litigation, or the legal process.  At the height of his family’s battle with the former Anglo Irish Bank, he was jailed for contempt of court, and central to ligation spanning multiple jurisdictions — from Russia to Cyprus, and from Sweden to Ukraine. Now, however, Quinn junior has opened up a new legal front.  Quinn junior, along with his wife Karen, has issued legal proceedings in the High Court in relation to QuinnBet, the sports betting business established by members of the Quinn family. Quinn…