Review Request: Always extract zookeeper-*.tar.gz so that we can run 'make check' (even if we are not building the native library).

[Benjamin Hindman]

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Review request for mesos, Andy Konwinski and Charles Reiss.


Summary
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See summary.


Diffs
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  third_party/Makefile.am cafdb00 

Diff: https://reviews.apache.org/r/4124/diff


Testing
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./configure --without-included-zookeeper && make check


Thanks,

Benjamin