comment: virtual_machine_power_cycle_and_question

There is an erroneous comment in virtual_machine_power_cycle_and_question.py
list_datastore_info.py: don't swallow exceptions

We don't want to train people to swallow exceptions. In samples it's probably fine to just blow up on something really unexpected since the target audience are programmers.
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Merge pull request #64 from trel/patch-1

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