This test seems to assume that the switch completes
processing of the first packet before start processing
the second one. I don't see any code ensuring that.
Workaround the problem by giving 1 second for the upcall.
Signed-off-by: YAMAMOTO Takashi <yamamoto@valinux.co.jp> Signed-off-by: Ben Pfaff <blp@nicira.com>