Fix quantile test (#167)

Author: Ariel Shtul

test/test.py

@@ -1025,7 +1025,7 @@ def testAggregations(self):
  self.assertEqual('10', res[13])
  self.assertEqual('7', res[15])
  self.assertEqual('3.60555127546', res[17])
- self.assertEqual('10', res[19])
+ self.assertEqual('8', res[19])
  self.assertEqual(['RediSearch', 'RedisAI', 'RedisJson'], res[21])
  self.assertEqual('RediSearch', res[23])
  self.assertEqual(2, len(res[25]))