Review Request 20895: SAMZA-257: hello-samza bin/grid script exits when running bootstrap the first time

[David Chen]

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Review request for samza.


Bugs: SAMZA-257
    https://issues.apache.org/jira/browse/SAMZA-257


Repository: samza-hello-samza


Description
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SAMZA-257: Check whether YARN is installed in stop_yarn(). Update Kafka 
download version to 0.8.1.1 due to dead link.


Diffs
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  bin/grid a144d116d63c9b8d56c8b92fd858441dbf076e0e 

Diff: https://reviews.apache.org/r/20895/diff/


Testing
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Thanks,

David Chen