Make sure we have net-tools in travis for inspec
Make sure we have net-tools in travis for inspec

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

opscode-cookbooks/tftp,chef-cookbooks/tftp,opscode-cookbooks/tftp,chef-cookbooks/tftp