geneve: Fix the byte swapping for the VNI

Type: fix

- swipe away the vomit indent left last time.
- add tests for VNIs > 16bit

Change-Id: I2d1f591bfb9d7a18996c38969365a509168d4193
Signed-off-by: Neale Ranns <nranns@cisco.com>

test/template_bd.py

@@ -74,7 +74,7 @@ class BridgeDomain(object):
         """
 
         encapsulated_pkt = self.encapsulate(self.frame_request,
-                                            self.single_tunnel_bd)
+                                            self.single_tunnel_vni)
 
         self.pg0.add_stream([encapsulated_pkt, ])
 
@@ -102,7 +102,7 @@ class BridgeDomain(object):
         # Pick first received frame and check if it's correctly encapsulated.
         out = self.pg0.get_capture(1)
         pkt = out[0]
-        self.check_encapsulation(pkt, self.single_tunnel_bd)
+        self.check_encapsulation(pkt, self.single_tunnel_vni)
 
         payload = self.decapsulate(pkt)
         self.assert_eq_pkts(payload, self.frame_reply)