Sort repoman check results in output

Currently, the check results are output in dict order which is
implementation-defined. This makes it hard to compare results coming
from two machines (Python versions).

Instead, sort all the results lexically.
diff --git a/pym/repoman/utilities.py b/pym/repoman/utilities.py
index aec61fe..415825e 100644
--- a/pym/repoman/utilities.py
+++ b/pym/repoman/utilities.py
@@ -309,7 +309,7 @@
 	full = options.mode == 'full'
 	# we only want key value pairs where value > 0 
 	for category, number in \
-		filter(lambda myitem: myitem[1] > 0, iter(stats.items())):
+		filter(lambda myitem: myitem[1] > 0, sorted(stats.items())):
 		formatter.add_literal_data("  " + category.ljust(30))
 		if category in qawarnings:
 			formatter.push_style("WARN")