release os-vif 1.14.0

- os-vif 1.13.0 intoduced a regression where
   both os-vif and libvirt plugged the vif into
   ovs in an attempt to fix bug #1734320.
 - This release revert that behavior and
   include some other minor fixes.
 - This change include extentions to enable
   generic-os-vif-offloads for vrouter. As
   such the version is increased to 1.14.0
   instead of 1.13.2

Change-Id: I1b82857e0c2eb6dfc2aecd6765fc4729bf77ef61
Depends-On: https://review.openstack.org/#/c/629025

deliverables/stein/os-vif.yaml

@@ -20,3 +20,7 @@ releases:
       - hash: db5216357b1be93d91aa48b2878599f2dfef02a8
         repo: openstack/os-vif
     version: 1.13.1
+  - projects:
+      - hash: 192d6fd1149e56bd14f9e0f9fab54c056ab02373
+        repo: openstack/os-vif
+    version: 1.14.0