Release Neutron for stable/xena

$ git log --oneline --no-merges 19.6.0..edfb66d15
dc2762edfc Ensure redirect-type=bridged not used for geneve networks
fc8960c16a Fix concurrent port binding activate
ed44efb443 Revert "Ensure vlan network traffic is not centralized"
92e55ab51f [OVN] Explicitly define the fixed IPs for the metadata port
ed96c94d41 Fix default value for MTUs, when not provided
1e244c57c5 [OVS] Allow custom ethertype traffic in the ingress table
2fb9ddb01e Delete the PB level registers when deleting the duplicated PB
7ca09bfc2e Only create a frozen  Row on matching events
fe0ffa1a2e Ensure vlan network traffic is not centralized
93fddc453c Rename setup-mtu-t1 argument because it is misleading

Change-Id: Iff7e32431444df45ec820f052e82ec89a7ad88d8

deliverables/xena/neutron.yaml

@@ -57,6 +57,10 @@ releases:
     projects:
       - repo: openstack/neutron
         hash: ee781c277b3aa47eb8f891568fb4b1b8359c2f38
+  - version: 19.7.0
+    projects:
+      - repo: openstack/neutron
+        hash: edfb66d1575aaabc49d321f1f6135d2f6cfe32b0
 branches:
   - name: stable/xena
     location: 19.0.0.0rc1