Use new InSpec integration tests

[chris-rock]

• depends on Fix issues highlighted in #114 #116
• uses kitchen-dokken in travis
• update vagrant boxes

[coveralls]

Coverage remained the same at 100.0% when pulling 458efe0 on chris-rock/kitchen-dokken into a39ccdf on master.

[chris-rock]

fixes #115

[atomic111]

thanks for your great work. the last 4 failure will be fixed in the next PRs and also opened a ticket for this #121

rspec ./spec/recipes/login_defs_spec.rb:36 # os-hardening::login_defs uses uid_min and gid_min in /etc/login.defs
rspec ./spec/recipes/sysctl_spec.rb:31 # os-hardening::sysctl intel should detect intel cpu
rspec ./spec/recipes/sysctl_spec.rb:47 # os-hardening::sysctl amd should detect amd cpu
rspec ./spec/recipes/sysctl_spec.rb:61 # os-hardening::sysctl fallback should detect intel cpu