* Industries Qatar sinks 10 pct after slashing dividend * Q4 results, dividends support other markets * Saudi banks rally after Bank Albilad dividend news * Property stocks lead gains in Dubai * DAMAC, to list Monday, trades at lower multiples in London By Olzhas Auyezov DUBAI, Jan 11 (Reuters) - Most Gulf stock markets maintained their positive momentum on Sunday, supported by good corporate news, but major petrochemical producer Industries Qatar tumbled and dragged down the Doha bourse after an**uncing a dividend cut. ...