Improve File resources idempotency

* use selinux_ignore_defaults parameter for directory to avoid this kind
  of issue:
(...) seltype: seltype changed 'swift_var_run_t' to 'var_run_t'

* Do not manage ownership for /etc/swift/*-server to avoid this kind of
  issue:
(...) owner changed 'root' to 'swift'

* Do not manage /etc/init.d/swift-container-sync file, already managed
  by packaging:
~ dpkg -S /etc/init.d/swift-container-sync
swift-container: /etc/init.d/swift-container-sync

Change-Id: I1d742d118943fb0b11c47fd322052f50156e2994

spec/defines/swift_storage_generic_spec.rb

@@ -65,8 +65,6 @@ describe 'swift::storage::generic' do
         )}
         it { is_expected.to contain_file("/etc/swift/#{t}-server/").with(
           :ensure => 'directory',
-          :owner  => 'swift',
-          :group  => 'swift'
         )}
       end
       # TODO - I do not want to add tests for the upstart stuff