HADOOP-10956. Fix create-release script to include docs and necessary txt files. (kasha)
(cherry picked from commit ce0462129fe09898fd9b169cae0564cb6d9bc419)
(cherry picked from commit 9855e884cbf56715ed88d1fe943f0baf8fe1637f)
(cherry picked from commit 8d20ec5c0fc170a38dd0139bd6e1db3aa5d9eeee)