ISPN-5013 Stored Script Execution 

https://issues.jboss.org/browse/ISPN-5013

WARNING: this is merely a preview of stored script execution. Please contribute to the design doc:
https://github.com/infinispan/infinispan/wiki/Script-Execution-Design
and obviously comment on the code here.
`Map<String, ?>` is probably a better signature for parameters. Should have maybe used that instead of `Object[]` for remote listeners.