branch-2 (and probably others) fail check of generated source artifact

00:06:59 Diff against source tree
[Pipeline] }
[Pipeline] // dir
[Pipeline] sh
00:07:00 [HBase_Nightly_branch-2-MO2I3RYUAQ2OT52Z2B54XSO6W34ZHP3JU2DA5UQYCAVNS747RZWQ] Running shell script
00:07:01 Checking against things we don't expect to include in the source tarball (git related, hbase-native-client, etc.)
00:07:01 Any output here are unexpected differences between the source artifact we'd make for an RC and the current branch.
00:07:01 The expected differences are on the < side and the current differences are on the > side.
00:07:01 In a given set of differences, '.' refers to the branch in the repo and 'unpacked_src_tarball' refers to what we pulled out of the tarball.
00:07:01 3a4
00:07:01 > Only in ./hbase-backup: .DS_Store
00:07:01 4a6
00:07:01 > Only in .: .pylintrc
[Pipeline] }