Koji Kawamura 37a0e1b304 NIFI-4715: Update currentKeys after listing loop
ListS3 used to update currentKeys within listing loop, that causes
    duplicates. Because S3 returns object list in lexicographic order, if we
    clear currentKeys during the loop, we cannot tell if the object has been
    listed or not, in a case where newer object has a lexicographically
    former name.

Signed-off-by: James Wing <jvwing@gmail.com>

This closes #3116, closes #2361.
2018-11-03 14:26:00 -07:00
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