Hanging test due to no timeout set / hanging sampler and Test duration

@pmouawad ([Bug 61814](https://bz.apache.org/bugzilla//show_bug.cgi?id=61814&redirect=false)):
Currently when you check Schedule in Thread group and:

- fix a duration for your test
- Don't set any timeout on HTTP requests or use a non interruptible sampler

Your test can hang infinitely as JMeter will not interrupt the Hanging samplers even after duration of Thread Group has been reached.

This is a frequent problem faced by JMeter users (I remember that I have answered this SO question at least 10 times). Even non newbie can get trapped.

Shouldn't we introduce this to avoid hanging test that give a feeling of broken JMeter while the problem is in the hanging targetted server ?:

- Option 1: Add an option in Scheduler part called "Interrupt pending Threads after duration + security margin (1m) that could be a field or property" on Thread Group (checked by default)
- Option 2 : Add it at test plan level to avoid repeating the configuration
On start of Thread Group, an additional TimerTask would be triggered after duration + security margin and would do the following:
run equivalent (refactor) of code at:
- https://github.com/apache/jmeter/blob/trunk/src/core/org/apache/jmeter/engine/StandardJMeterEngine.java#L326

OS: All