fix test

Author: antonshevelev

tests/RedisConnectionTest.php

@@ -171,7 +171,7 @@ public function testConnectionTimeoutRetryCount()
         try {
             // should try to reconnect 2 times, before finally failing
             // results in 3 times sending the PING command to redis
-            sleep(2);
+            sleep(3);
             $db->ping();
         } catch (SocketException $e) {
             $exception = true;