killall -9 chef-server chef-server-webui missed child processes like
chef     22145  4.2  1.3 160048 56136 ?        Sl   06:56   0:01 merb : chef-server (api) : worker (ports 4001)
Merge pull request #1789 from MirantisDellCrowbar/bug/chef-server/pebbles/master

chef-install.sh fails to kill chef-server from upstart and bring it up with bluepill