Simplify redundant resource dependency

We don't have to define both "require" and "subscribe" and just having
subscribe is enough.

Change-Id: I1a19c54ba2e53a5d5adc30fc025a08693e2cf566

manifests/init.pp

@@ -645,10 +645,9 @@ class tempest(
       command     => "tempest init ${tempest_workspace}",
       path        => ['/bin', '/usr/bin'],
       refreshonly => true,
-      require     => Package['tempest'],
+      subscribe   => Package['tempest'],
     }
     Package<| tag == 'tempest-package' |> -> Exec['tempest-workspace']
-    Package['tempest'] ~> Exec['tempest-workspace']
     Exec['tempest-workspace'] -> Tempest_config<||>
 
     $tempest_conf = "${tempest_workspace}/etc/tempest.conf"

spec/classes/tempest_init_spec.rb

@@ -432,7 +432,7 @@ describe 'tempest' do
           :command     => 'tempest init /var/lib/tempest',
           :path        => ['/bin', '/usr/bin'],
           :refreshonly => true,
-          :require     => 'Package[tempest]'
+          :subscribe   => 'Package[tempest]'
         )
       end
     end