Add Capsule configuration for the webserver JAR, so that the classes-only `webserver.jar` is published as well
as the full fat `corda-webserver.jar`. This is required for running the tutorial/template from IntelliJ.
* Add webAddress back to NMS as it shifts the port allocation for all subsequent nodes and causes all demos to break.
* Attachment demo: fix node names
* Notary demo: fix certificate paths & ports
* IRS demo: role decider fixed to allocate roles properly. Previously it used to pick current node as the Fixer, causing both nodes to initiate the trade flow, resulting in double spend exceptions..
