sgsn: Avoid race condition in TC_suspend_rau()

In f_routing_area_update() we are sending a RAU Complete to the SGSN
and then immediately afterwards send a GTP-U from the simulated
GGSN to the SGSN.  That GTP might reach the SGSN faster than the
RAU Complete, resulting in a test failure.

Change-Id: Ic489e0857115cf24965e413a39918edc5a8f44f8
1 file changed