deadlock analysis for QA done logic

[guruofquality]

• detect done blocks in wait()
• after elapsed time in wait(), dump dot graph of done blocks
• user can use dot to turn graph into png and see blockage

[guruofquality]

https://github.com/guruofquality/gras/commit/f6140c831e1585eed07d35c17a2792f214e94636