CORDA-540: Fix to make IRS demo code pass in AMQP mode (#1769)

* CORDA-540: Do not use concrete instance of an ArrayList as wire representation of it may be different

* CORDA-540: Make data structures suitable for AMQP serialization

* CORDA-540: Use "name" instead of "toString()"

Classes like "net.corda.finance.contracts.DayCountBasisDay" override "toString()" which leads to error behaviour

node-api/src/main/kotlin/net/corda/nodeapi/internal/serialization/amqp/EnumSerializer.kt

@@ -30,9 +30,9 @@ class EnumSerializer(declaredType: Type, declaredClass: Class<*>, factory: Seria
     override fun readObject(obj: Any, schema: Schema, input: DeserializationInput): Any {
         val enumName = (obj as List<*>)[0] as String
         val enumOrd = obj[1] as Int
-        val fromOrd = type.asClass()!!.enumConstants[enumOrd]
+        val fromOrd = type.asClass()!!.enumConstants[enumOrd] as Enum<*>?
 
-        if (enumName != fromOrd?.toString()) {
+        if (enumName != fromOrd?.name) {
             throw NotSerializableException("Deserializing obj as enum $type with value $enumName.$enumOrd but "
                     + "ordinality has changed")
         }