Code review comment for lp:~alan-griffiths/mir/fix-1603922

Network problems but also a few of these (?!):
17:06:09 /home/phablet/mir-testrunner/mir-smoke-test-runner.sh: line 24: 11321 Segmentation fault (core dumped) ${root}mir_demo_server --test-timeout=$timeout --test-client $root$client