Review Request 18023: Fix tests to not use cgroup isolators unless available and running as root.

[Ian Downes]

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https://reviews.apache.org/r/18023/
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Review request for mesos, Benjamin Hindman, Niklas Nielsen, TILL TOENSHOFF, and 
Vinod Kone.


Repository: mesos-git


Description
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See summary.


Diffs
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  src/tests/mesos.hpp 018d4ffde6d0b34c9f4239ab8c26f2fb430f0279 
  src/tests/mesos.cpp 8c0b00621d5bbafd265af7e6488b1c289c8e1811 

Diff: https://reviews.apache.org/r/18023/diff/


Testing
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make check
sudo make check


Thanks,

Ian Downes