Fix plugins after former refactoring

plugins/dump.py

@@ -6,5 +6,5 @@ import sardine
 class Plugin(sardine.BasePlugin):
 
     def render_plain(self):
-        out = "args = %s" % repr(self.args)
+        out = "args = %s" % repr(self.data.args)
         return out

plugins/sh.py

@@ -8,4 +8,4 @@ import sardine
 class Plugin(sardine.BasePlugin):
 
     def render_plain(self):
-        return subprocess.check_output(self.args)
+        return subprocess.check_output(self.data.args)