Deploy to webheads in series.
Deploy to webheads in series.

This is intended to cause commander to run `deploy_app`
for each host in series instead of parallel like it does now.
It also adds a 5s wait before allowing the next code push to happen.

TODO: Add a check for a 200 response code from the host before proceeding to
the next host.

analytics-pros/mozilla-bedrock,rishiloyola/bedrock,glogiotatidis/bedrock,gerv/bedrock,kyoshino/bedrock,gerv/bedrock,analytics-pros/mozilla-bedrock,andreadelrio/bedrock,gauthierm/bedrock,andreadelrio/bedrock,hoosteeno/bedrock,petabyte/bedrock,davehunt/bedrock,Sancus/bedrock,TheoChevalier/bedrock,SujaySKumar/bedrock,TheoChevalier/bedrock,craigcook/bedrock,Sancus/bedrock,sylvestre/bedrock,ericawright/bedrock,davehunt/bedrock,ericawright/bedrock,hoosteeno/bedrock,TheoChevalier/bedrock,pmclanahan/bedrock,Sancus/bedrock,alexgibson/bedrock,chirilo/bedrock,craigcook/bedrock,jpetto/bedrock,gauthierm/bedrock,sgarrity/bedrock,petabyte/bedrock,MichaelKohler/bedrock,TheJJ100100/bedrock,CSCI-462-01-2017/bedrock,dudepare/bedrock,flodolo/bedrock,gerv/bedrock,alexgibson/bedrock,Jobava/bedrock,petabyte/bedrock,kyoshino/bedrock,craigcook/bedrock,pmclanahan/bedrock,TheJJ100100/bedrock,pmclanahan/bedrock,gauthierm/bedrock,marcoscaceres/bedrock,flodolo/bedrock,jpetto/bedrock,rishiloyola/bedrock,glogiotatidis/bedrock,schalkneethling/bedrock,sgarrity/bedrock,yglazko/bedrock,sylvestre/bedrock,analytics-pros/mozilla-bedrock,mermi/bedrock,MichaelKohler/bedrock,chirilo/bedrock,yglazko/bedrock,mahinthjoe/bedrock,andreadelrio/bedrock,gauthierm/bedrock,hoosteeno/bedrock,schalkneethling/bedrock,mozilla/bedrock,alexgibson/bedrock,glogiotatidis/bedrock,SujaySKumar/bedrock,bensternthal/bedrock,alexgibson/bedrock,kyoshino/bedrock,chirilo/bedrock,CSCI-462-01-2017/bedrock,schalkneethling/bedrock,mahinthjoe/bedrock,sylvestre/bedrock,Jobava/bedrock,pascalchevrel/bedrock,bensternthal/bedrock,hoosteeno/bedrock,TheoChevalier/bedrock,glogiotatidis/bedrock,l-hedgehog/bedrock,craigcook/bedrock,rishiloyola/bedrock,mkmelin/bedrock,TheJJ100100/bedrock,davehunt/bedrock,ericawright/bedrock,pmclanahan/bedrock,bensternthal/bedrock,pascalchevrel/bedrock,jpetto/bedrock,sgarrity/bedrock,mahinthjoe/bedrock,jgmize/bedrock,jgmize/bedrock,mahinthjoe/bedrock,kyoshino/bedrock,Sancus/bedrock,petabyte/bedrock,mozilla/bedrock,Jobava/bedrock,sgarrity/bedrock,pascalchevrel/bedrock,andreadelrio/bedrock,SujaySKumar/bedrock,rishiloyola/bedrock,sylvestre/bedrock,jgmize/bedrock,CSCI-462-01-2017/bedrock,mkmelin/bedrock,MichaelKohler/bedrock,l-hedgehog/bedrock,CSCI-462-01-2017/bedrock,marcoscaceres/bedrock,mermi/bedrock,mermi/bedrock,yglazko/bedrock,TheJJ100100/bedrock,flodolo/bedrock,flodolo/bedrock,Jobava/bedrock,gerv/bedrock,schalkneethling/bedrock,MichaelKohler/bedrock,dudepare/bedrock,SujaySKumar/bedrock,davehunt/bedrock,mkmelin/bedrock,bensternthal/bedrock,l-hedgehog/bedrock,mkmelin/bedrock,mozilla/bedrock,ericawright/bedrock,analytics-pros/mozilla-bedrock,marcoscaceres/bedrock,mozilla/bedrock,chirilo/bedrock,dudepare/bedrock,marcoscaceres/bedrock,yglazko/bedrock,dudepare/bedrock,jpetto/bedrock,mermi/bedrock,jgmize/bedrock,l-hedgehog/bedrock,pascalchevrel/bedrock