KYLIN-3876 Fix flink config option wrong key mapping

[yanghua]

JIRA ref : https://issues.apache.org/jira/browse/KYLIN-3876

[asfgit]

Can one of the admins verify this patch?

[codecov-io]

Codecov Report

❗ No coverage uploaded for pull request base (engine-flink@cc4128f). Click here to learn what that means.
The diff coverage is 0%.

@@               Coverage Diff               @@
##             engine-flink     #521   +/-   ##
===============================================
  Coverage                ?   24.27%           
  Complexity              ?     5029           
===============================================
  Files                   ?     1166           
  Lines                   ?    70903           
  Branches                ?    10078           
===============================================
  Hits                    ?    17215           
  Misses                  ?    51948           
  Partials                ?     1740

Impacted Files	Coverage Δ	Complexity Δ
...e/kylin/engine/flink/FlinkOnYarnConfigMapping.java	0% <0%> (ø)	0 <0> (?)

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