rhizo_base: Ensure runit installed before using runit

Make sure that runit is installed and configured before attempting to
restart services using /usr/bin/sv (aka runit).

modules/rhizo_base/manifests/lcr.pp

@@ -19,6 +19,7 @@ class rhizo_base::lcr {
 
   exec { 'restart-lcr':
       command     => '/usr/bin/sv restart lcr',
+      require => Class['rhizo_base::runit'],
       refreshonly => true,
     }