Former Riverdance star Michael Flatley has secured a costly reprieve in his Commercial Court battle to keep receivers from taking control of Castlehyde, his Co Cork mansion. The entertainer has drawn down extra insurance of €2 million for the 150-acre property near Fermoy, a policy that will remain in place until next May.  Rodney Hudson, counsel for Flatley, said the cover was secured through Dolmen Insurance on Wednesday afternoon “with some considerable difficulty”, at a premium rate of €500,000 per annum. It follows an urgent application by property lender Novellus and its receivers that the existing cover of €8 million was…