Bug: StopStrategies&StopStrategies will throw unformatted message

Reproduce:
```
StopStrategies.stopAfterAttempt(0);
```
It will throw print:
```
java.lang.IllegalArgumentException: maxAttemptNumber must be >= 1 but is %d [0]
```
The reason is for guava will format "%s", but we input "%d".
