Workaround for a very annoying issue. For some reason, policy handlers
cannot import models globally
diff --git a/planetstack/model_policies/model_policy_Network.py b/planetstack/model_policies/model_policy_Network.py
index 0511bee..f48b25a 100644
--- a/planetstack/model_policies/model_policy_Network.py
+++ b/planetstack/model_policies/model_policy_Network.py
@@ -1,6 +1,8 @@
 from core.models import *
 
 def handle(network):
+	from core.models import SliceDeployments,NetworkDeployments
+	from collections import defaultdict
 	# network deployments are not visible to users. We must ensure
 	# networks are deployed at all deploymets available to their slices.
 	slice_deployments = SliceDeployments.objects.all()