Remove code to handle metadata; instead, let tasks handle metadata and simply concat and send any service.meta.* files/values. Prefix run files with a ts to allow for concurrent runs of the same service.

t/pt-agent/replace_special_vars.t

@@ -34,6 +34,8 @@ sub test_replace {
       output_files => \@output_files,
       service      => 'service-name',
       lib_dir      => '/var/lib/pt-agent',
+      meta_dir     => '/var/lib/pt-agent/meta',
+      stage_dir    => '/var/spool/.tmp',
    );
 
    is(