Remove metastore upgrade script from 3.1.3000 to 4.0.0

HIVE-23965 relies on a dockerized metastore that is on a internal metastore version (3.1.3000) so to be usable in master there needs to be an upgrade script bringing it to 4.0.0. 

Although this script is only used by tests it should be nice to remove it in order to avoid maintaining two files on every change in the schema of the metastore.

One possible way to do this would be to bring the dockerized metastore  to a standard Apache version (for instance 3.2.0).