Monitor threads spending time on IO

[mpapis]

It is possible that threads are not blocked but are spending time on IO and preventing things from happening, we could write an example to simulate that and catch such situations.

Question: Should it be separate agent or parameter?

Related code:

• jvm-monitoring-agent/src/com/toptal/jvm/monitoring/Agent.java

  Line 115 in e22e410

  (thread.getState() != Thread.State.BLOCKED)