Merged in rnicoll-warnings (pull request #246)

Correct warnings

node/src/main/kotlin/com/r3corda/node/services/statemachine/FiberRequest.kt

@@ -68,6 +68,10 @@ sealed class FiberRequest(val topic: String,
         override fun toString(): String {
             return "Expecting response via topic ${receiveTopic} of type ${responseTypeName}"
         }
+
+        // We have to do an unchecked cast, but unless the serialized form is damaged, this was
+        // correct when the request was instantiated
+        @Suppress("UNCHECKED_CAST")
         val responseType: Class<R>
             get() = Class.forName(responseTypeName) as Class<R>
     }

node/src/test/kotlin/com/r3corda/node/services/persistence/PerFileCheckpointStorageTests.kt

@@ -96,7 +96,7 @@ class PerFileCheckpointStorageTests {
 
     private var checkpointCount = 1
     private val request = FiberRequest.ExpectingResponse("topic", null, random63BitValue(), random63BitValue(), null,
-            java.lang.String::class.java)
+            kotlin.String::class.java)
     private fun newCheckpoint() = Checkpoint(SerializedBytes(Ints.toByteArray(checkpointCount++)), request)
 
 }