By Christoph Steitz and Andreas Rinke FRANKFURT (Reuters) -The German government plans to take a 30% stake in Uniper and will allow the utility to pass on some energy costs to customers as part of a bailout package that sources told Reuters could be finalised this week. The government also plans to quadruple a credit line to the company via state-owned bank KfW, lifting it to 8 billion euros ($8.2 billion) from 2 billion euros, according to an economy ministry document seen by Reuters. Reuters earlier reported that Berlin was leaning towards taking a stake of up to 30% and that a deal would al…