Minor fix for config file sample

related to CORD-200, CORD-209
- fix typo in network-cfg.json
- remove segmentrouting_dell.conf since we don't need this anymore
  with the new Network Configuration Subsystem

Change-Id: I5dcb2e2e0e6b89c4770df2485a8d27fbcc05cf67
diff --git a/tools/package/config/samples/network-cfg.json b/tools/package/config/samples/network-cfg.json
index c2af8b8..9232847 100644
--- a/tools/package/config/samples/network-cfg.json
+++ b/tools/package/config/samples/network-cfg.json
@@ -28,8 +28,8 @@
                 "routerMac" : "00:00:00:00:01:80",
                 "isEdgeRouter" : true,
                 "adjacencySids" : [
-                    { "sid" : 100, "port" : [2, 3] },
-                    { "sid" : 200, "port" : [4, 5] }
+                    { "sid" : 100, "ports" : [2, 3] },
+                    { "sid" : 200, "ports" : [4, 5] }
                 ]
             }
     	},