BRUSSELS (Reuters) - Euro zone finance ministers are likely to approve the next tranche of loans to Greece on Tuesday although the money is unlikely to be disbursed before December and a deal on debt reduction may need further talks. Officials familiar with preparations for the finance ministers' meeting expect a "political endorsement in principle" on unfreezing loans to Athens, after Greece completed almost all the reforms that were required. "It is clear that Greece has delivered," the chairman of the euro zone finance ministers, Jean-Claude Juncker, told reporters before the meeting. ...