Replacing el-api.jar and el-impl.jar with el-api-2.2.jar and el-impl-2.2.jar solve the problem.
Also you need to add in your context.xml the context parameter
org.apache.myfaces.EXPRESSION_FACTORY
com.sun.el.ExpressionFactoryImpl
com.sun.faces.expressionFactory
com.sun.el.ExpressionFactoryImpl