COOK-2280: Allow custom timing of reload after nginx_site
COOK-2280: Allow custom timing of reload after nginx_site

Allows the reload notification to be triggered immediately in situations where
that's useful. For instance where nginx is installed near the start of a chef
run, and the default site needs to be disabled quickly or other sites need to
be made active ASAP.

Retains identical default behavior.

ttab/nginx,Sauraus/chef_nginx,gansbrest/nginx,channelgrabber/nginx,chef-cookbooks/chef_nginx,fsultan/nginx,luishdez/nginx-cookbook,miketheman/nginx,blmlove409/nginx_cookbook,8la/nginx,ffuenf/nginx,jharveysmith/nginx,axos88/chef_nginx,blmlove409/nginx_cookbook,evertrue/nginx-cookbook,7bfa689ac3c4be50f8ba6c1ea8c5f316/nginx,cpbtechnology/nginx,Altiscale/nginx,feedhenry-cookbooks/nginx,blmlove409/nginx_cookbook,Roblox/chef_nginx,ffuenf/nginx,axos88/chef_nginx,newlywish/nginx,jharveysmith/nginx,gansbrest/nginx,chef-cookbooks/chef_nginx,periscopedevelopment/nginx,miketheman/nginx,ttab/nginx,7bfa689ac3c4be50f8ba6c1ea8c5f316/nginx,Sauraus/chef_nginx,cokeboL/nginx,sanguis/nginx,AudaxHealthInc/nginx,kri5/nginx,Sauraus/chef_nginx,Lispython/nginx-cookbook,myplaceonline/nginx,Roblox/chef_nginx,gansbrest/nginx,cpbtechnology/nginx,8la/nginx,evertrue/nginx-cookbook,luishdez/nginx-cookbook,AudaxHealthInc/nginx,8la/nginx,kri5/nginx,whatcould/nginx,fsultan/nginx,Roblox/chef_nginx,7bfa689ac3c4be50f8ba6c1ea8c5f316/nginx,trotttrotttrott/cookbook-nginx_node-tail,evertrue/nginx-cookbook,chef-cookbooks/chef_nginx,spulec/nginx_private,axos88/chef_nginx,cokeboL/nginx,newlywish/nginx,whatcould/nginx,auth0/chef-nginx,Altiscale/nginx,periscopedevelopment/nginx,miketheman/nginx,newlywish/nginx,periscopedevelopment/nginx,zuazo-forks/opscode-cookbooks-nginx,channelgrabber/nginx,fsultan/nginx,myplaceonline/nginx,cpbtechnology/nginx,feedhenry-cookbooks/nginx,luishdez/nginx-cookbook,AudaxHealthInc/nginx,ffuenf/nginx,Altiscale/nginx,auth0/chef-nginx,cokeboL/nginx,kri5/nginx,ttab/nginx,channelgrabber/nginx,zuazo-forks/opscode-cookbooks-nginx