Fix wireshark namespace conflict and don't reinstall
Fix -a
Try to install openvswitch-testcontroller if needed
Make sure we 'sudo kill' our sudo pexpect process in close().

This should more reliably shut down pexpect subprocesses when
build.py exits before completion.
skip test if RT_GROUP_SCHED is not enabled
measure loss with udp iperf
use udp with iperf to measure loss. pings are not reliable
Merge pull request #388 from cdburkard/patches/intfOptions

measure loss with udp iperf
Merge pull request #387 from cdburkard/patches/iperf_bw

use udp with iperf to measure loss. pings are not reliable
Merge pull request #386 from cdburkard/patches/cpu_test

Skip test_cpu.py if RT_GROUP_SCHED is not enabled
add Ryu controller to mininet