Use container travis infra and cache bundler installs
Use container travis infra and cache bundler installs

iennae/users,chef-cookbooks/users,nkadel-skyhook/nkadel-chef-users,RobertNorthard/users,FlorentFlament/users,wegtam/users,RobertNorthard/users,gleamicus/users,gleamicus/users,wegtam/users,opscode-cookbooks/users,chef-cookbooks/users,opscode-cookbooks/users,FlorentFlament/users,nkadel-skyhook/nkadel-chef-users,iennae/users