CORD-1892: Break rogue dependency between ControllerNetwork and
Instances.
This is a quick fix for this bug. A longer-term fix would be to drop
Network.instances from the data model, for the autogenerated dependency
graph to come out to be valid.

Change-Id: Ia9f36d04b3f97d7b169580b88fc112e275af27ed
(cherry picked from commit d10af67260688b2f8f26a2e0e5f8e94428c9d72a)
diff --git a/xos/synchronizer/model-deps b/xos/synchronizer/model-deps
index e183915..d57597c 100644
--- a/xos/synchronizer/model-deps
+++ b/xos/synchronizer/model-deps
@@ -299,8 +299,7 @@
         ["NetworkTemplate", "template", "network"],
         ["Slice", "owner", "ownedNetworks"],
         ["Slice", "permitted_slices", "availableNetworks"],
-        ["Slice", "slices", "networks"],
-        ["Instance", "instances", "networks"]
+        ["Slice", "slices", "networks"]
         
     ],