By Michael Holden LONDON (Reuters) – Dubai’s ruler, Sheikh Mohammed bin Rashid al-Maktoum, inflicted “exorbitant” domestic abuse against his ex-wife, a senior British judge has concluded as he awarded her sole responsibility for looking after their children. The ruling caps the end of an extraordinary, bitter and hugely expensive three-year custody battle at the High Court in London between Mohammed and his former wife, Princess Haya bint al-Hussein, half-sister of Jordan’s King Abdullah. With revelations of kidnappings, death threats, her affair with a bodyguard, blackmail, spying, and sophis…