controller: Disable inactivity probe for statctrl

The inactivity probe was disabled for all connections
over unix socket [0]. However, the statctrl connection
wasn't updated by this patch. Remove the inactivity probe
from statctrl connection as well.

[0] c16e5da ("controller: disable OpenFlow inactivity probing")
Signed-off-by: Ales Musil <amusil@redhat.com>
Acked-by: Vladislav Odintsov <odivlad@gmail.com <mailto:odivlad@gmail.com>>
Acked-by: Mark Michelson <mmichels@redhat.com>
Signed-off-by: Mark Michelson <mmichels@redhat.com>

controller/statctrl.c

@@ -233,7 +233,7 @@ statctrl_thread_handler(void *arg)
     struct statctrl_ctx *ctx = arg;
 
     /* OpenFlow connection to the switch. */
-    struct rconn *swconn = rconn_create(5, 0, DSCP_DEFAULT,
+    struct rconn *swconn = rconn_create(0, 0, DSCP_DEFAULT,
                                         1 << OFP15_VERSION);
 
     while (!latch_is_set(&ctx->exit_latch)) {