_PrintGroupedParams: sort before printing

It's a lot easier, when looking at the output, if you can search the
parameter you're looking for alphabetically.

Signed-off-by: Guido Trotter <ultrotter@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

scripts/gnt-cluster

@@ -225,7 +225,7 @@ def _PrintGroupedParams(paramsdict, level=1):
 
   """
   indent = "  " * level
-  for item, val in paramsdict.items():
+  for item, val in sorted(paramsdict.items()):
     if isinstance(val, dict):
       ToStdout("%s- %s:", indent, item)
       _PrintGroupedParams(val, level=level + 1)