Sort PyUnit test results

Since PyUnit already sorts the results based on the test method, this sorting is useful in cases where multiple test classes are present in a single file and when we want to have a consistent sorting across all test classes.

lib/py_unit_adapter.rb

@@ -45,6 +45,6 @@ def parse_output(output)
       count += total_failed
     end
 
-    {count:, failed: total_failed, error_messages: assertion_error_matches.flatten.compact_blank}.compact_blank
+    {count:, failed: total_failed, error_messages: assertion_error_matches.flatten.compact_blank.sort}.compact_blank
   end
 end