Review Request: Flume-1662. Convert null body in events to zero sized arrays.

[Hari Shreedharan]

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https://reviews.apache.org/r/7668/
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Review request for Flume.


Description
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Convert null event bodies to byte[0]


This addresses bug FLUME-1662.
    https://issues.apache.org/jira/browse/FLUME-1662


Diffs
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  flume-ng-core/src/test/java/org/apache/flume/source/http/TestJSONHandler.java 
e8f256b 
  flume-ng-sdk/src/main/java/org/apache/flume/event/EventBuilder.java 4d96114 
  flume-ng-sdk/src/main/java/org/apache/flume/event/JSONEvent.java e62f689 
  flume-ng-sdk/src/main/java/org/apache/flume/event/SimpleEvent.java fed7bb6 

Diff: https://reviews.apache.org/r/7668/diff/


Testing
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Ran full build. All unit tests pass.


Thanks,

Hari Shreedharan