kvm: Added VNI Devices as normal bridge slave devs (#7836)

This will allow for VXLAN configurations to utilize tags on the physical network of a zone

Author: fermosan

plugins/hypervisors/kvm/src/main/java/com/cloud/hypervisor/kvm/resource/LibvirtComputingResource.java

@@ -1702,7 +1702,8 @@ private String matchPifFileInDirectory(final String bridgeName) {
             "^enx",
             "^dummy",
             "^lo",
-            "^p\\d+p\\d+"
+            "^p\\d+p\\d+",
+            "^vni"
     };
 
     /**