Review Request 72579: RANGER-2853:"Unauthenticated : Please check the permission in the policy for the user": An NPE in ranger admin when enable kms.

[ding gaozhan]

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Review request for ranger.


Bugs: RANGER-2853
    https://issues.apache.org/jira/browse/RANGER-2853


Repository: ranger


Description
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fix a NPE error in ranger-admin when enable kms with kerberos.


Diffs
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  security-admin/src/main/java/org/apache/ranger/biz/KmsKeyMgr.java 84cee5c8c 


Diff: https://reviews.apache.org/r/72579/diff/1/


Testing
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Manual test passed


Thanks,

ding gaozhan