Github user bzz commented on the issue:
https://github.com/apache/zeppelin/pull/1600
Thank you @aspen01, @placeybordeaux
In order to be merged, this branch have to be rebased on top of the master,
which itself already includes CI fixes, i.e 1c7d8fb.
This branch must not include any other commits, except for ones that
implement "HDFS to backup and restore notebook" - edae7bc, d94eb16 need to be
removed.
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