Add guard since server recipe won't run on Windows
Add guard since server recipe won't run on Windows

jssjr/git,edmunds-chef/git,JoeyJiao/git,vinyar/git,Nordstrom/git,rapid7-cookbooks/git,veered/git,krobertson/chef-git,optimizely/git,vinyar/git,optimizely/git,jssjr/git,chef-cookbooks/git,protec-cookbooks/git,heathsnow/git,heathsnow/git,heathsnow/git,andyt/git,tas50/git,jtimberman/git,pghalliday-cookbooks/git,chef-cookbooks/git,grozen/git,jssjr/git,protec-cookbooks/git,h4ck3rm1k3/git,myabc/git,edmunds-chef/git,brodock/git,optimizely/git,h4ck3rm1k3/git,protec-cookbooks/git,edmunds-chef/git,hughsaunders/git,joncotton/git,fheng/git,lostintime/chef-git,deepak/chef-cookbook-git,h4ck3rm1k3/git,glensc/chef-cookbook-git,vinyar/git