Supply label name to Nodes

We are mistakenly supplying the image name for the node type. This
should be the label name.

Change-Id: I35982d0d03ae00af77a515839b53542c5d830c89
diff --git a/tests/nodepool/test_nodepool_integration.py b/tests/nodepool/test_nodepool_integration.py
index ef459e4..67968a3 100644
--- a/tests/nodepool/test_nodepool_integration.py
+++ b/tests/nodepool/test_nodepool_integration.py
@@ -53,7 +53,7 @@
         # Test a simple node request
 
         nodeset = model.NodeSet()
-        nodeset.addNode(model.Node('controller', 'fake-nodepool'))
+        nodeset.addNode(model.Node('controller', 'fake-label'))
         job = model.Job('testjob')
         job.nodeset = nodeset
         request = self.nodepool.requestNodes(None, job)