PIG-4324: Remove jsch-LICENSE.txt

git-svn-id: https://svn.apache.org/repos/asf/pig/branches/branch-0.14@1638223 13f79535-47bb-0310-9956-ffa450edef68
PIG-4314: BigData_5 hang on some machine (PIG-4314-5.patch)

git-svn-id: https://svn.apache.org/repos/asf/pig/branches/branch-0.14@1638235 13f79535-47bb-0310-9956-ffa450edef68