[testing] update test ruby version, skip TK tests
[testing] update test ruby version, skip TK tests

- Ruby has been updated, this stays current.
- Skip all Test Kitchen matrix instances to cut down on wasted test time.

newlywish/nginx,Roblox/chef_nginx,newlywish/nginx,periscopedevelopment/nginx,cokeboL/nginx,Roblox/chef_nginx,miketheman/nginx,kri5/nginx,myplaceonline/nginx,evertrue/nginx-cookbook,cpbtechnology/nginx,axos88/chef_nginx,AudaxHealthInc/nginx,ffuenf/nginx,chef-cookbooks/chef_nginx,evertrue/nginx-cookbook,ffuenf/nginx,kri5/nginx,luishdez/nginx-cookbook,miketheman/nginx,cokeboL/nginx,7bfa689ac3c4be50f8ba6c1ea8c5f316/nginx,myplaceonline/nginx,newlywish/nginx,axos88/chef_nginx,fsultan/nginx,cpbtechnology/nginx,auth0/chef-nginx,Sauraus/chef_nginx,periscopedevelopment/nginx,axos88/chef_nginx,ttab/nginx,AudaxHealthInc/nginx,fsultan/nginx,chef-cookbooks/chef_nginx,8la/nginx,Sauraus/chef_nginx,Roblox/chef_nginx,7bfa689ac3c4be50f8ba6c1ea8c5f316/nginx,Altiscale/nginx,Sauraus/chef_nginx,periscopedevelopment/nginx,ffuenf/nginx,ttab/nginx,7bfa689ac3c4be50f8ba6c1ea8c5f316/nginx,Altiscale/nginx,auth0/chef-nginx,ttab/nginx,cokeboL/nginx,blmlove409/nginx_cookbook,miketheman/nginx,evertrue/nginx-cookbook,blmlove409/nginx_cookbook,AudaxHealthInc/nginx,chef-cookbooks/chef_nginx,Altiscale/nginx,fsultan/nginx,luishdez/nginx-cookbook,8la/nginx,cpbtechnology/nginx,blmlove409/nginx_cookbook,kri5/nginx,8la/nginx,luishdez/nginx-cookbook