Use ensure_packages to manage packages

Some package resources (e.g. gnupg) are also defined elsewhere.

manifests/deb_repository.pp

 class repomaster::deb_repository
 {
-  package {
-    [
-      'reprepro', 'nginx', 'gnupg',
-    ]:
-      ensure  => installed,
-      require => Class['network'];
-  }
+  ensure_packages(['reprepro', 'nginx', 'gnupg'])
 
   file { '/etc/motd':
     ensure  => file,

manifests/yum_repository.pp

@@ -5,7 +5,7 @@ class repomaster::yum_repository
     'x86_64',
   ]
 
-  package { 'createrepo-c': }
+  ensure_packages(['createrepo-c'])
 
   # RHEL, CentOS, Rocky, etc.
   repomaster::yum_repository::init_repos { 'enterprise linux':
@@ -32,7 +32,7 @@ class repomaster::yum_repository
   }
 
   # contains chronic, required by lysator_update_yum_repos_cron
-  package { 'moreutils': }
+  ensure_packages(['moreutils'])
 
   file { '/usr/local/bin/lysator_update_yum_repos_cron':
     ensure => file,