This commit fixes the SHA hashes for the Netty dependencies after Netty
was upgraded from version 4.1.8 to version 4.1.9.
Original commit: elastic/x-pack-elasticsearch@ca4c376886
The only tricky thing here was what to do about ES jars. We now ignore them for the jar sha checking, and the base elasticsearch license and notice is copied here, and elasticsearch jars are mapped to those license/notice files.
Original commit: elastic/x-pack-elasticsearch@a6373cfe4e