Initial PR for https://r3-cev.atlassian.net/projects/CORDA/issues/CORDA-442
Allow for cordformation not to specify which node is the network map.
When that happens Cordformation will start each node and make it serialize its NodeInfo to disk.
This make 'depolyNodes' slower. On my machine for the traderDemo it's ~25s
PersistentNetworkMapCache will load files from disk at startup.
Additionally nodeinfos are loaded in the networkMapCache only if they're newer than the currently known version.
* Change to using strings in CordformContext; X500Name is an external API dependency we're trying to avoid, X500Principal rearranges the order of the elements in a way we don't want, and trying to put CordaX500Name into Groovy in the time available is impractical. As such having pre-formatted strings used in the Cordform plugin makes most sense right now.
* Remove uses of CordaX500Name.x500
* Remove old X.500 parsing tools
* Move CordaX500Name.x500 into X500NameUtils
* Move X500NameUtils into internal