FOREX-Euro dips on caution ahead of banks' stress test results, yen firm

* European bank stress test results awaited LONDON, Oct 24 (Reuters) - The euro slipped on Friday, as investors were cautious ahead of the results on Sunday of stress tests on euro zone banks, while the yen was underpinned by safe-haven flows due to a fresh Ebola scare in New York. It fetched 136.70 yen, down about 0.1 percent. The euro zone's 130 biggest banks received the European Central Bank ...