Simplify the systemd detection to always work
Simplify the systemd detection to always work

Don't rely on knowing the particular version of the OS

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

opscode-cookbooks/push-jobs,chef-cookbooks/push-jobs,opscode-cookbooks/push-jobs,opscode-cookbooks/push-jobs,chef-cookbooks/push-jobs,chef-cookbooks/push-jobs