Fix RouteMod prefix matching

Reported-by: Allan Vidal <allanv@cpqd.com.br>
Signed-off-by: Joe Stringer <joestringernz@gmail.com>
Prevent crash when datapath disconnects

Signed-off-by: Joe Stringer <joestringernz@gmail.com>
rftest2: Ensure containers are stopped after test

Signed-off-by: Joe Stringer <joestringernz@gmail.com>
Add IP addresses,gateways to mininet2 topology

Signed-off-by: Joe Stringer <joestringernz@gmail.com>