@Before
fun setup() {
    mockNetwork = MockNetwork(listOf("net.corda.training"),
            notarySpecs = listOf(MockNetworkNotarySpec(CordaX500Name("Notary","London","GB"))))
    a = mockNetwork.createNode(MockNodeParameters())
    b = mockNetwork.createNode(MockNodeParameters())
    val startedNodes = arrayListOf(a, b)
    startedNodes.forEach { it.registerInitiatedFlow(IOUIssueFlowResponder::class.java) }
    mockNetwork.runNetwork()
}
@After
fun tearDown() {
    mockNetwork.stopNodes()
}