[COOK-837] - use .empty? instead of equality operator
[COOK-837] - use .empty? instead of equality operator

OpenGov/nagios,Tealium/nagios,chrisroberts/nagios,bitmonk/chef-nagios,OpenGov/nagios,mconf-cookbooks/nagios,cookbooks/oc-nagios,ChrisLundquist/nagios,JulianNL/nagios,cookbooks/oc-nagios,JulianNL/nagios,lusis/nagios,ovaistariq/nagios,schubergphilis/nagios,spudnic/nagios,polamjag/nagios,ChrisLundquist/nagios,jtimberman/nagios,spudnic/nagios,Springest/nagios,mrlamroger/nagios,schubergphilis/nagios,bitmonk/chef-nagios,aaronkvanmeerten/nagios,firebase/nagios,mattupstate/nagios,caleb/nagios,polamjag/nagios,firebase/nagios,spudnic/nagios,Tealium/nagios,cookbooks/mc-nagios,Piousbox-cookbooks/nagios,pierreozoux/nagios,JulianNL/nagios,Piousbox-cookbooks/nagios,spudnic/nagios,bitmonk/chef-nagios,mconf-cookbooks/nagios,earzur/nagios,mrlamroger/nagios,popsikle/nagios-5.3.5,firebase/nagios,firebase/nagios,aaronkvanmeerten/nagios,OpenGov/nagios,aaronkvanmeerten/nagios,cookbooks/oc-nagios,ChrisLundquist/nagios,ovaistariq/nagios,earzur/nagios,bitmonk/chef-nagios,chrisroberts/nagios,Tealium/nagios,schubergphilis/nagios,OpenGov/nagios,popsikle/nagios-5.3.5,Tealium/nagios,mattupstate/nagios,mrlamroger/nagios,Tealium/nagios,CanaryTek/nagios,cookbooks/mc-nagios,caleb/nagios,ovaistariq/nagios,chrisroberts/nagios,earzur/nagios,Tealium/nagios,mattupstate/nagios,jtimberman/nagios,hnakamur/nagios,Piousbox-cookbooks/nagios,JulianNL/nagios,Piousbox-cookbooks/nagios,jtimberman/nagios,mrlamroger/nagios,CanaryTek/nagios,mconf-cookbooks/nagios,polamjag/nagios,CanaryTek/nagios,cookbooks/mc-nagios