IRS demo to now has roles for NodeA/NodeB and most options are now~ optional. NodeA can be run without the shell script.

src/main/kotlin/com/r3corda/demos/IRSDemo.kt

@@ -249,6 +249,7 @@ private fun runNode(nodeParams : NodeParams) : Unit {
     } catch(e: InterruptedException) {
         node.stop()
     }
+    exitProcess(0)
 }
 
 private fun runUploadRates() {