[COOK-1956] - fix path for naxsi-core
[COOK-1956] - fix path for naxsi-core

Tests weren't passing under test kitchen until this path was fixed.
Testing completed successfully with:

bundle exec kitchen test --teardown --configuration naxsi_module

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