Review Request 16045: Fixed group to use 32 bit signed integers for sequence numbers.

[Ben Mahler]

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https://reviews.apache.org/r/16045/
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Review request for mesos, Benjamin Hindman, Vinod Kone, and Jiang Yan Xu.


Bugs: MESOS-867
    https://issues.apache.org/jira/browse/MESOS-867


Repository: mesos-git


Description
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See MESOS-867 for context.


Diffs
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  src/zookeeper/group.hpp 27b2ee9433e784ccc5b8809e8e0efe449e1da4ba 
  src/zookeeper/group.cpp 2ddc65e8655280cc7ff8e23aca561c6ec6e7e1e2 

Diff: https://reviews.apache.org/r/16045/diff/


Testing
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make check, also verified that numify<int32_t> works as expected.


Thanks,

Ben Mahler