exported sshkey does not require ssh package

This is necessary because of a bug with PuppetDB. Without this patch you
will get invalid relationship errors.

manifests/init.pp

@@ -471,7 +471,6 @@ class ssh (
     ensure  => $ssh_key_ensure,
     type    => $ssh_key_type,
     key     => $key,
-    require => Package[$packages_real],
   }
 
   # import all nodes' ssh keys