Adding tests for vlan crossconnects with double vlan tags

Change-Id: Icdfcbde3cc0d6ed6ba2dea1215098be672df6aaf
diff --git a/src/python/loxi/of13/oxm.py b/src/python/loxi/of13/oxm.py
index 7541ecf..a2c0a23 100755
--- a/src/python/loxi/of13/oxm.py
+++ b/src/python/loxi/of13/oxm.py
@@ -6170,6 +6170,7 @@
 
 VPWS                        = 1
 TUNNEL_ID_BASE              = 0x10000
+TUNNEL_ID_BASE_CROSS_CONNECT = 0x20000
 L3_PHP                      = 32
 
 class exp1ByteValue(oxm):