add -n flag to bluepill start_command for chef-expander
add -n flag to bluepill start_command for chef-expander

Signed-off-by: jtimberman <d6955d9721560531274cb8f50ff595a9bd39d66f@opscode.com>

zenmate/DEPRECATED-chef-server,hcheung/chef-server,xacaxulu/chef-server,stephenlauck/chef-server,jjasghar/chef-server,eeyun/chef-server,eeyun/chef-server,chef-cookbooks/chef-server,vinyar/chef-server-1,CVTJNII/chef-server,juliandunn/chef-server,GannettDigital/chef-server,cookbooks/oc-chef-server