.cli files for pre/post-deploy

(Based on JBDS use case - see EAP6-1)

There could be a pre/post-deploy.cli and pre/post-undeploy.cli in the deployed archive, and the server could perform these CLI scripts on respective events.

We (David, Stuart, Jason, Max, Ondra) have discussed this on EAP F2F 2014.
The preliminar outcome was "no way" - because the deploying itself is a management operation, and you can't do another operation during that.

Still, I'm adding this issue for the sake of completness of the ESSC-20 list.