Add check_process_count feature
Add check_process_count feature

This check allows to validate if number of processes are running that are being expected

chinthakagodawita/specinfra,higanworks/specinfra,gh2k/specinfra,chef-partners/specinfra-cisco,miketheman/specinfra,stoned/specinfra,edolnx/specinfra,r7kamura/specinfra,glenux/contrib-specinfra,verisign/specinfra,serverspec/specinfra,pfaffle/specinfra,stefanhorning/specinfra,mactkg/specinfra,sorah/specinfra,ihassin/specinfra,RoboticCheese/specinfra,sean-horn/specinfra,aibou/specinfra,sergueik/specinfra,minimum2scp/specinfra,hideyuki/specinfra,tacahilo/specinfra,uroesch/specinfra,seroron/specinfra,chorrell/specinfra,elibus/specinfra,nurse/specinfra,winebarrel/specinfra,bodgit/specinfra,lurdan/specinfra,hfm/specinfra,skamithi/specinfra,k0kubun/specinfra,electrical/specinfra,mizzy/specinfra,thenexus6/specinfra,optimizely/specinfra