OTTAWA (Dow Jones)--Canadian Finance Minister Jim Flaherty said Thursday G20 countries have to coordinate planning stimulus exit strategies."That's important so that one country's banking system isn't advantaged over another country's banking system as we exit from this period of stimulus, which isn't going to happen for a while," Flaherty told reporters. He expects G20 finance ministers and central bank governors to discuss exit strategies at their weekend meeting in St. Andrews, U.K. He cautioned, "Not that it's time to implement exit strategies but that we coordinate our planning in terms of exit strategies." Regarding moral hazard when some banks are...