IDEA: random java.time.Duration #677

[styloooo]

Implemented a feature requested in issue #677 to enable Faker to generate randomized Java Duration instances from 0 to a given long.

• FakeDuration.atMostMinutes takes a long minutesMax and returns a Java Duration object of at most minutesMax minutes.
• FakeDuration.atMostHours takes a long hoursMax and returns a Java Duration object of at most hoursMax hours.
• FakeDuration.atMostDays takes a long daysMax and returns a Java Duration objects of at most daysMax days.
• FakeDuration.atMostSeconds takes a long secondsMax and returns a Java Duration object of at most secondsMax seconds.