If CM's purge_node() fails then raise an error.

Author: tombh

cm/chef.py

@@ -140,8 +140,13 @@ def purge_node(node):
     :param node: a dict containing the id of a node to purge
     """
     client = _get_client()
-    client.delete_node(node['id'])
-    client.delete_client(node['id'])
+    node_id = node['id']
+    body, status = client.delete_node(node_id)
+    if status != 200:
+        raise RuntimeError('Could not purge node {node_id}: {body}'.format(**locals()))
+    body, status = client.delete_client(node_id)
+    if status != 200:
+        raise RuntimeError('Could not purge node client {node_id}: {body}'.format(**locals()))
 
 
 def converge_controller():