Test Debian 8/9 and Ubuntu 18.04 in Travis
Test Debian 8/9 and Ubuntu 18.04 in Travis

Signed-off-by: Tim Smith <764ef62106582a09ed09dfa0b6bff7c05fd7d1e4@chef.io>

chef-cookbooks/gems,opscode-cookbooks/gems,opscode-cookbooks/gems,chef-cookbooks/gems