Review Request: Make python example framework exit with non-zero status for some errors

[Charles Reiss]

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https://reviews.apache.org/r/2816/
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Review request for mesos.


Summary
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Calls sys.exit() with the result of SchedulerDriver.run() rather than ignoring 
the return value. Relies on 0 being the 'OK' status code.


This addresses bug MESOS-79.
    https://issues.apache.org/jira/browse/MESOS-79


Diffs
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  src/examples/python/test_framework.py 0e4b14c 

Diff: https://reviews.apache.org/r/2816/diff


Testing
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Thanks,

Charles