checkbox-touch: make test name bold on description screens

Fixes: https://bugs.launchpad.net/checkbox-touch/+bug/1382969
Signed-off-by: Maciej Kisielewski <maciej.kisielewski@canonical.com>
provider-checkbox:bin:network: Add Min/Max/Avg throughputs to logs

Start the iperf client with -i 1 to get bandwidth data every seconds.
Also use -f m to always get units in mb/s and avoid conversion.
"automatic merge by tarmac [r=zkrynicki][bug=1382969][author=kissiel]"
"automatic merge by tarmac [r=sylvain-pineau,cgregan][bug=1347120][author=sylvain-pineau]"