ncsid: reconfigure gateway when default route is missing

This will ensure that default gateway can be reconfigured if any failure
happens at the first time.

Tested:
On a machine that has default route configured, manually deleted the
route, without this change it will stay broken. This change will bring
the route back in 1mins or so.

Change-Id: I7f8f1fafcbcfb3f4b904af8999d1a5c17400e99e
Signed-off-by: Yuxiao Zhang <yuxiaozhang@google.com>
1 file changed