Refactoring related to BFT notary demo (#680)

* Fix: Add missing @StartableByRPC to fix the Raft notary demo
* Make loadConfig take a Config object, for cordformation Node
* Unduplicate User.toMap
* Unduplicate WHITESPACE regex, choose possessive form
* Use slash to make a Path
* Remove Companion where redundant
* Remove unused code

client/rpc/src/smoke-test/kotlin/net/corda/kotlin/rpc/NodeConfig.kt

@@ -46,9 +46,3 @@ class NodeConfig(
         return if (obj == null) config else body(config, obj).atPath(path)
     }
 }
-
-private fun User.toMap(): Map<String, Any> = mapOf(
-    "username" to username,
-    "password" to password,
-    "permissions" to permissions
-)