Jitter should be unconditional

In RetrySettings

```
public abstract boolean isJittered()
Jitter determines if the delay time should be randomized. In most cases, if jitter is set to true the actual delay time is calculated in the following way:
 actualDelay = rand_between(0, min(maxRetryDelay, delay))
The default value is true.
```

This method is way overspecified. We should deprecate it and always jitter. 