Updated ublox odin greentea test configuration file connect statement

Statement now uses network interface wifiInterface() method to
get wifi interface instead of casting.

Author: Mika Leppänen

tools/test_configs/OdinInterface.json

@@ -8,8 +8,8 @@
             "value" : "new OdinWiFiInterface()"
         },
         "connect-statement" : {
-            "help" : "Disabled until EMAC updated",
-            "value" : null
+            "help" : "Must use 'net' variable name",
+            "value" : "net->wifiInterface()->connect(WIFI_SSID, WIFI_PASSWORD)"
         },
         "echo-server-addr" : {
             "help" : "IP address of echo server",