Github user aljoscha commented on the issue:
https://github.com/apache/flink/pull/5901
@suez1224 I did an alternative version in #5953. All YARN tests currently
have the problem that they are only executed with the "new" (FLIP-6) mode or
legacy mode (only the secured IT Case). In my PR I change that to use the
legacy flag that we specify on Travis. Meaning that all YARN tests now run for
both configurations.---
