Increased the default retry count & interval
Increased the default retry count & interval

before:

```
irb(main):017:0> 5.times.map { |i| [2<<i, 60].min }
=> [2, 4, 8, 16, 32]
```

after:

```
irb(main):018:0> 10.times.map { |i| [1<<i, 60].min }
=> [1, 2, 4, 8, 16, 32, 60, 60, 60, 60]
```

frsyuki/hotdog,yyuu/hotdog