Intermittent test failures

[hyperthunk]

t4@iske:distributed-process $ ./dist/build/TestCH/TestCH
Basic features:
  Ping: [OK]
  Math: [OK]
  Timeout: [OK]
  Timeout0: [OK]
  SendToTerminated: [OK]
  TypedChannnels: [OK]
  MergeChannels: [Failed]
ERROR: thread blocked indefinitely in an MVar operation

This could be related to similar problems as issue #87 but I've not had time to investigate yet.

[hyperthunk]

And observed this evening (looking at HEAD) - ./dist/build/TestStats/TestStats (which does barely anything at all) can lock up if you run it in a tight loop for long enough. Around 20 iterations is usually enough for me on a dual core I5. Looking at the event log output, some thread is getting stuck in a foreign call - further investigation to follow.

[LaurentRDC]

Now that we have updated the test suite to use tasty, we can make use of tasty-flaky to at least mark intermittently-failing tests as such