Review Request: SQOOP-812 Sqoop2: Serialization of Configuration objects to and from json is not working properly

[Jarek Cecho]

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https://reviews.apache.org/r/8848/
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Review request for Sqoop.


Description
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I've fix methods toJson and fillValues() to work with new schema of 
configuration objects.


This addresses bug SQOOP-812.
    https://issues.apache.org/jira/browse/SQOOP-812


Diffs
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  common/src/main/java/org/apache/sqoop/model/FormUtils.java 585d02e 
  common/src/test/java/org/apache/sqoop/model/TestFormUtils.java c80bd45 

Diff: https://reviews.apache.org/r/8848/diff/


Testing
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I've added new unit test.


Thanks,

Jarek Cecho