[CORDA-442] let Driver run without network map (#1890)

* [CORDA-442] let Driver run without network map

- Nodes started by driver run without a networkMapNode.

- Driver does not take a networkMapStartStrategy anymore

- a new parameter in the configuration "noNetworkMapServiceMode" allows for a node not to be a networkMapNode nor to connect to one.

- Driver now waits for each node to write its own NodeInfo file to disk and then copies it into each other node.

- When driver starts a node N, it waits for every node to be have N nodes in their network map.

Note: the code to copy around the NodeInfo files was already in DemoBench, the NodeInfoFilesCopier class was just moved from DemoBench into core (I'm very open to core not being the best place, please advise)

client/rpc/src/integration-test/kotlin/net/corda/client/rpc/RPCStabilityTests.kt

@@ -92,6 +92,7 @@ class RPCStabilityTests {
             startAndStop()
         }
         val numberOfThreadsAfter = waitUntilNumberOfThreadsStable(executor)
+
         assertTrue(numberOfThreadsBefore >= numberOfThreadsAfter)
         executor.shutdownNow()
     }