[PDI-10568] Install ESAPI properties to ~/.kettle

*5.1.0 Backlog, not release finalization*

If ESAPI properties are not otherwise defined for the JVM, install defaults to $HOME/.kettle/esapi
Set this directory as the default esapi resources directory.
Failure to install will fall back to using defaults from the classloader (previous configuration method).

http://jira.pentaho.com/browse/PDI-10568