Set Bridge Information for NSX Integration

VM interfaces need to connect to a nsx-specific bridge vs the default
of br-int in order for NSX integration to be successful.

Change-Id: I152d9d4d161f18336d9b412d578846f749a0162b

defaults/main.yml

@@ -296,6 +296,10 @@ nova_network_services:
   calico:
     use_forwarded_for: True
     metadata_proxy_enabled: False
+  nsx:
+    use_forwarded_for: True
+    metadata_proxy_enabled: True
+    ovs_bridge: nsx-managed
 
 # Nova Scheduler
 nova_cpu_allocation_ratio: 2.0