Review Request 58866: fixed SAMZA-1248. use processor id for stand alone barrier

[Boris Shkolnik]

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Review request for samza.


Bugs: SAMZA-1248
    https://issues.apache.org/jira/browse/SAMZA-1248


Repository: samza


Description
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removed unused variable


Diffs
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  samza-core/src/main/java/org/apache/samza/zk/ZkJobCoordinator.java 
2535654cee37feeb472517b8673a7bb12b3cc1fc 
  samza-core/src/main/java/org/apache/samza/zk/ZkUtils.java 
fee840511fbc19da2e19525a97fcfb5812a70a53 
  samza-core/src/test/java/org/apache/samza/zk/TestZkUtils.java 
b8dc2953ead2fb11fa22db5ec30b19a74a779830 


Diff: https://reviews.apache.org/r/58866/diff/1/


Testing
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Thanks,

Boris Shkolnik